diff --git a/spectacle.yml b/spectacle.yml
index 64d4c99..f3c016f 100644
--- a/spectacle.yml
+++ b/spectacle.yml
@@ -25,7 +25,7 @@
             blue: 255
           background_color: &black
             red: 0
-            green: 0
+            green: 255
             blue: 0
           stability: 10
           lines: 5
@@ -54,17 +54,18 @@
         period: 80
   - name: titi
     sequence:
-#      - pattern:
-#          type: Blink
-#          fade :
-#            nbr_iterations: 20
-#            begin_color: *black
-#            end_color: &cyan
-#                red: 0
-#                green: 255
-#                blue: 255
-#          max_iteration : 10
-#        period: 50
+      - pattern:
+          type: FadeRandom
+          fade :
+            steps: 50
+            begin_color: *black
+            end_color: &cyan
+                red: 0
+                green: 255
+                blue: 255
+          stability : 30
+          max_iteration : 50
+        period: 100
       - pattern:
           type: Rainbow
           max_iteration: 200
diff --git a/src/main.rs b/src/main.rs
index b156f7e..e60beb1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,7 +16,6 @@ use clap::Parser;
 use patterns::Strip;
 use std::path::Path;
 use std::sync::{Arc, Mutex};
-use std::time::Duration;
 use tokio::sync::mpsc;
 use tokio::sync::watch;
 
diff --git a/src/patterns.rs b/src/patterns.rs
index 8cb3ba0..48dcdb2 100644
--- a/src/patterns.rs
+++ b/src/patterns.rs
@@ -6,13 +6,17 @@ mod fill_random;
 mod fill_unstable;
 mod blink;
 mod rain;
+mod fade_random;
 
 use serde_derive::{Deserialize, Serialize};
 use std::fmt;
-use std::ops::{Div, Index, IndexMut, SubAssign};
+use std::ops::{AddAssign, Div, Index, IndexMut, SubAssign};
+use rand::Rng;
+use rand::rngs::ThreadRng;
 use crate::patterns::blink::Blink;
 use crate::patterns::color_wipe::ColorWipe;
 use crate::patterns::fade::Fade;
+use crate::patterns::fade_random::FadeRandom;
 use crate::patterns::fill_random::FillRandom;
 use crate::patterns::fill_unstable::FillUnstable;
 use crate::patterns::rain::Rain;
@@ -30,6 +34,7 @@ pub(crate) enum Patterns<const N: usize> {
     FillUnstable(FillUnstable<N>),
     Blink(Blink<N>),
     Rain(Rain<N>),
+    FadeRandom(FadeRandom<N>)
 }
 
 pub trait Pattern : Iterator {
@@ -52,6 +57,7 @@ impl<const N: usize> Iterator for Patterns<N> {
             Patterns::FillUnstable(p) => p.next(),
             Patterns::Blink(p) => p.next(),
             Patterns::Rain(p) => p.next(),
+            Patterns::FadeRandom(p) => p.next(),
         }
     }
 }
@@ -69,6 +75,7 @@ impl<const N: usize> Pattern for Patterns<N> {
             Patterns::FillUnstable(p) => p.init(),
             Patterns::Blink(p) => p.init(),
             Patterns::Rain(p) => p.init(),
+            Patterns::FadeRandom(p) => p.init(),
         }
     }
 
@@ -82,6 +89,7 @@ impl<const N: usize> Pattern for Patterns<N> {
             Patterns::FillUnstable(p) => p.is_last_iteration(),
             Patterns::Blink(p) => p.is_last_iteration(),
             Patterns::Rain(p) => p.is_last_iteration(),
+            Patterns::FadeRandom(p) => p.is_last_iteration(),
         }
     }
 }
@@ -115,13 +123,55 @@ impl Div<u8> for PixelColor {
 
 impl SubAssign for PixelColor {
     fn sub_assign(&mut self, rhs: Self) {
-        println!("self.red {}, red {}", self.red, rhs.red);
         self.red = self.red.saturating_sub(rhs.red);
         self.green = self.red.saturating_sub(rhs.green);
         self.blue = self.red.saturating_sub(rhs.blue);
     }
 }
 
+impl AddAssign for PixelColor {
+    fn add_assign(&mut self, rhs: Self) {
+        self.red = self.red.saturating_add(rhs.red);
+        self.green = self.red.saturating_add(rhs.green);
+        self.blue = self.red.saturating_add(rhs.blue);
+    }
+}
+
+impl PixelColor {
+    /// apply random delta to pixel and return computed value
+    ///
+    /// # Arguments
+    ///
+    /// * `pixel`: pixel to apply delta
+    /// * `stability`: amplitude of delta between 0 and `stability`
+    ///
+    /// returns: PixelColor
+    ///
+    pub fn random_delta(&self, stability: usize, rng: &mut ThreadRng) -> PixelColor {
+        let red_delta = rng.gen_range(0..stability) as u8;
+        let green_delta = rng.gen_range(0..stability) as u8;
+        let blue_delta = rng.gen_range(0..stability) as u8;
+        let operation = rng.gen_bool(0.5);
+        let red;
+        let green;
+        let blue;
+        if operation {
+            red = self.red.saturating_add(red_delta);
+            green = self.green.saturating_add(green_delta);
+            blue = self.blue.saturating_add(blue_delta);
+        } else {
+            red = self.red.saturating_sub(red_delta);
+            green = self.green.saturating_sub(green_delta);
+            blue = self.blue.saturating_sub(blue_delta);
+        }
+        PixelColor {
+            red,
+            green,
+            blue
+        }
+    }
+}
+
 ///
 /// a basic newtype based on a fix array size.
 ///
diff --git a/src/patterns/fade_random.rs b/src/patterns/fade_random.rs
new file mode 100644
index 0000000..ca21799
--- /dev/null
+++ b/src/patterns/fade_random.rs
@@ -0,0 +1,61 @@
+use crate::patterns::fade::Fade;
+use crate::Strip;
+use serde::{Serialize, Deserialize};
+use crate::patterns::Pattern;
+
+/// # Blink
+///
+/// fade from one color to an other then go back several times
+#[derive(Serialize, Deserialize, Debug, Eq, Hash, PartialEq, Copy, Clone)]
+pub struct FadeRandom<const N: usize> {
+    #[serde(default)]
+    pub(crate) current_iteration: usize,
+    pub(crate) max_iteration: Option<usize>,
+    pub(crate) stability: usize,
+    fade: Fade<N>,
+}
+
+impl<const N: usize> Pattern for FadeRandom<N> {
+    type Strip = Strip<N>;
+
+    fn init(&mut self) -> Option<Self::Strip> {
+        None
+    }
+
+    fn is_last_iteration(&self) -> bool {
+        match self.max_iteration {
+            None => { false }
+            Some(max_iter) => {
+                if self.current_iteration >= max_iter {
+                    true
+                } else {
+                    false
+                }
+            }
+        }
+    }
+}
+
+impl<const N: usize> Iterator for FadeRandom<N> {
+    type Item = Strip<N>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let strip = self.fade.next();
+        match strip {
+            None => { None }
+            Some(mut fade) => {
+                let rng = rand::thread_rng();
+                for i in 0..N {
+                    match fade[i] {
+                        None => { }
+                        Some(pixel) => {
+                            fade[i] = Some(pixel.random_delta(self.stability, &mut rng.clone()))
+                        }
+                    }
+
+                }
+                Some(fade)
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/patterns/fill_random.rs b/src/patterns/fill_random.rs
index 727b37a..d4ec092 100644
--- a/src/patterns/fill_random.rs
+++ b/src/patterns/fill_random.rs
@@ -1,4 +1,3 @@
-use rand::Rng;
 use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
@@ -45,25 +44,9 @@ impl<const N: usize> Iterator for FillRandom<N> {
         }
 
         let mut strip = Strip::<N>::default();
-        let mut rng = rand::thread_rng();
+        let rng = rand::thread_rng();
         for i in 0..N {
-            let red_delta = rng.gen_range(0..self.stability) as u8;
-            let green_delta = rng.gen_range(0..self.stability) as u8;
-            let blue_delta = rng.gen_range(0..self.stability) as u8;
-            let operation = rng.gen_bool(0.5);
-            let red;
-            let green;
-            let blue;
-            if operation {
-                red = self.color.red.saturating_add(red_delta);
-                green = self.color.green.saturating_add(green_delta);
-                blue = self.color.blue.saturating_add(blue_delta);
-            } else {
-                red = self.color.red.saturating_sub(red_delta);
-                green = self.color.green.saturating_sub(green_delta);
-                blue = self.color.blue.saturating_sub(blue_delta);
-            }
-            let c = PixelColor { red, green, blue };
+            let c = self.color.random_delta(self.stability, &mut rng.clone());
             strip[i] = Some(c);
         }
         self.current_iteration += 1;
diff --git a/src/patterns/fill_unstable.rs b/src/patterns/fill_unstable.rs
index 4a39b4c..efc6599 100644
--- a/src/patterns/fill_unstable.rs
+++ b/src/patterns/fill_unstable.rs
@@ -1,4 +1,3 @@
-use rand::Rng;
 use crate::patterns::{Pattern, PixelColor};
 use crate::Strip;
 use serde::{Serialize, Deserialize};
@@ -44,26 +43,9 @@ impl<const N: usize> Iterator for FillUnstable<N> {
             return None;
         }
 
-        let mut strip = Strip::<N>::default();
         let mut rng = rand::thread_rng();
-        let red_delta = rng.gen_range(0..self.stability) as u8;
-        let green_delta = rng.gen_range(0..self.stability) as u8;
-        let blue_delta = rng.gen_range(0..self.stability) as u8;
-        let operation = rng.gen_bool(0.5);
-        let red;
-        let green;
-        let blue;
-        if operation {
-            red = self.color.red.saturating_add(red_delta);
-            green = self.color.green.saturating_add(green_delta);
-            blue = self.color.blue.saturating_add(blue_delta);
-        } else {
-            red = self.color.red.saturating_sub(red_delta);
-            green = self.color.green.saturating_sub(green_delta);
-            blue = self.color.blue.saturating_sub(blue_delta);
-        }
-        strip.fill(PixelColor { red, green, blue });
+        let unstable_color = self.color.random_delta(self.stability, &mut rng);
         self.current_iteration += 1;
-        Some(strip)
+        Some(Strip::<N>::new(unstable_color))
     }
 }
\ No newline at end of file
diff --git a/src/runner.rs b/src/runner.rs
index 9f39448..5450d29 100644
--- a/src/runner.rs
+++ b/src/runner.rs
@@ -79,8 +79,6 @@ pub struct Spectacle<const N: usize> {
     channels: HashMap<Address, Receiver<Strip<N>>>,
     default_runner: Option<(DeviceSequence<N>, Sender<Strip<N>>)>,
     default_receiver: Option<Receiver<Strip<N>>>,
-    // #[serde(skip)]
-    buffered_strip: Strip<N>,
 }
 
 impl<const N: usize> Spectacle<N> {
@@ -109,14 +107,14 @@ impl<const N: usize> Spectacle<N> {
         self.default_receiver = Some(rx);
     }
 
-    pub fn nbr_tasks(&self) -> usize {
-        let mut nbr = 0;
-        if self.default_receiver.is_some() {
-            nbr += 1;
-        }
-        nbr += self.runners.len();
-        nbr
-    }
+    // pub fn nbr_tasks(&self) -> usize {
+    //     let mut nbr = 0;
+    //     if self.default_receiver.is_some() {
+    //         nbr += 1;
+    //     }
+    //     nbr += self.runners.len();
+    //     nbr
+    // }
 
     pub fn get_channel(&self, mac_address: &Address) -> Option<Receiver<Strip<N>>> {
         let channel = self.channels.get(mac_address);