diff --git a/vinscant/src/main.rs b/vinscant/src/main.rs
index 956cc38..0ac76bf 100644
--- a/vinscant/src/main.rs
+++ b/vinscant/src/main.rs
@@ -22,7 +22,7 @@ use mfrc522::{
 };
 use palette;
 
-use lib::wifi;
+use lib::{ping_pong::PingPong, wifi};
 
 #[toml_cfg::toml_config]
 pub struct Config {
@@ -117,6 +117,9 @@ fn main() {
     let scan_interface = SpiInterface::new(scan_spi_device);
     let mut scanner = Mfrc522::new(scan_interface).init().unwrap();
 
+    // esp32s2
+    //let led_pin = pins.gpio?;
+    // esp32
     let led_pin = pins.gpio5;
     let channel = peripherals.rmt.channel0;
     let mut led_strip = LedPixelEsp32Rmt::<RGB8, LedPixelColorGrb24>::new(channel, led_pin).unwrap();
@@ -124,7 +127,7 @@ fn main() {
     let mut status_notifier = StatusNotifier {
         led_strip,
         leds: 8,
-        idle_effect: Box::new(Wipe::new(8, vec![Srgb::new(0x00, 0x00, 0x00), Srgb::new(0xff, 0x7f, 0x00)], true)),
+        idle_effect: Box::new(PingPong::new(8, vec![Srgb::new(0xff, 0x7f, 0x00)])),
     };
 
     let mut last_uid = hex::encode([0_u8]);
diff --git a/vinscant/src/ping_pong.rs b/vinscant/src/ping_pong.rs
new file mode 100644
index 0000000..cadd8ad
--- /dev/null
+++ b/vinscant/src/ping_pong.rs
@@ -0,0 +1,91 @@
+use smart_led_effects::strip::EffectIterator;
+use palette::{FromColor, Hsv, Srgb};
+use rand::Rng;
+
+#[derive(Debug)]
+pub struct PingPong {
+    position: usize,
+    buffer: Vec<Srgb<u8>>,
+    reverse: bool,
+    end: usize,
+    count: usize,
+    randomize: bool,
+}
+
+impl PingPong {
+    pub fn new(count: usize, data: Vec<Srgb<u8>>) -> Self {
+        let mut buffer = vec![Srgb::<u8>::new(0, 0, 0); count - 1];
+        buffer.extend(data);
+        buffer.extend(vec![Srgb::<u8>::new(0, 0, 0); count - 1]);
+
+        let end = buffer.len() - count;
+
+        PingPong {
+            position: 0,
+            buffer,
+            reverse: false,
+            end,
+            count,
+            randomize: false,
+        }
+    }
+
+    pub fn colour_ping_pong(count: usize, colour: Option<Srgb<u8>>) -> Self {
+        let mut s = PingPong::new(count, vec![Srgb::new(0, 0, 0); count]);
+        match colour {
+            Some(colour) => s.fill_ping_pong(colour),
+            None => s.randomize_colour_ping_pong(),
+        }
+        s
+    }
+
+    fn fill_ping_pong(&mut self, colour: Srgb<u8>) {
+        let mut buffer = vec![Srgb::<u8>::new(0, 0, 0); self.count];
+        buffer.extend(vec![colour; self.count]);
+        buffer.extend(vec![Srgb::<u8>::new(0, 0, 0); self.count]);
+        self.buffer = buffer;
+    }
+
+    fn randomize_colour_ping_pong(&mut self) {
+        let mut rng = rand::thread_rng();
+        let colour: Srgb<u8> =
+            Srgb::from_color(Hsv::new(rng.gen_range(0.0..360.0), 1.0, 1.0)).into_format();
+        self.fill_ping_pong(colour);
+        self.randomize = true;
+    }
+}
+
+impl EffectIterator for PingPong {
+    fn name(&self) -> &'static str {
+        "PingPong"
+    }
+
+    fn next(&mut self) -> Option<Vec<Srgb<u8>>> {
+        let out = self
+            .buffer
+            .iter()
+            .skip(self.position)
+            .take(self.count)
+            .copied()
+            .collect::<Vec<Srgb<u8>>>();
+
+        if self.reverse {
+            self.position -= 1;
+            if self.position == 0 {
+                self.reverse = false;
+                if self.randomize {
+                    self.randomize_colour_ping_pong();
+                }
+            }
+        } else {
+            self.position += 1;
+            if self.position >= self.end {
+                self.reverse = true;
+                if self.randomize {
+                    self.randomize_colour_ping_pong();
+                }
+            }
+        }
+        Some(out)
+    }
+}