diff --git a/src/pattern/flashing.rs b/src/pattern/flashing.rs
new file mode 100644
index 0000000..592bfa5
--- /dev/null
+++ b/src/pattern/flashing.rs
@@ -0,0 +1,53 @@
+use super::Pattern;
+use crate::color::{self, Rgb};
+use std::{
+    collections::{vec_deque, VecDeque},
+    convert::TryFrom,
+    iter,
+};
+
+#[derive(Clone, Debug)]
+pub struct Flashing {
+    lights_buf: VecDeque<Rgb>,
+    width: u8,
+    colors: Vec<Rgb>,
+}
+
+impl Flashing {
+    pub fn new(colors: Vec<Rgb>, width: u8) -> Self {
+        Self {
+            colors,
+            width,
+            lights_buf: VecDeque::new(),
+        }
+    }
+}
+
+impl Pattern for Flashing {
+    fn step(&mut self) -> Result<bool, ()> {
+        self.lights_buf.rotate_right(self.width.into());
+        Ok(true)
+    }
+    fn init(&mut self, num_lights: u16) -> Result<(), ()> {
+        if self.lights_buf.len() == 0 {
+            return Err(());
+        }
+        let length_factor = u16::try_from(self.lights_buf.len())
+            .or(Err(()))?
+            .saturating_mul(u16::from(self.width));
+
+        let buf_length = color::min_with_factor(num_lights, length_factor)?;
+
+        self.lights_buf = self
+            .colors
+            .iter()
+            .flat_map(|&x| iter::repeat(x).take(self.width.into()))
+            .cycle()
+            .take(buf_length.into())
+            .collect();
+        Ok(())
+    }
+    fn get_strip(&self) -> vec_deque::Iter<Rgb> {
+        self.lights_buf.iter()
+    }
+}
diff --git a/web/src/Colors.svelte b/web/src/Colors.svelte
new file mode 100644
index 0000000..94fc272
--- /dev/null
+++ b/web/src/Colors.svelte
@@ -0,0 +1,22 @@
+<script	lang="ts">
+	// From: https://css-tricks.com/snippets/javascript/random-hex-color/
+	function randomColor() {
+		return "#" + Math.floor(Math.random()*16777215).toString(16);
+	}
+	export let value = [randomColor()];
+
+	function newColor() {
+	console.log(value);
+		value =	[...value, randomColor()];
+	}
+	function removeColor() {
+		if(newColor.length > 1)	{
+			value =	value.slice(0, -1);
+		}
+	}
+</script>
+{#each value as	value}
+	<input type="color" bind:value={value} />
+{/each}
+<button	type="button" on:click={newColor} href="#">+</button>
+<button	type="button" on:click={removeColor} href="#">-</button>
diff --git a/web/src/Form.svelte b/web/src/Form.svelte
index 7580906..a0a182c 100644
--- a/web/src/Form.svelte
+++ b/web/src/Form.svelte
@@ -1,49 +1,53 @@
-<script lang="ts">
-	let url = "/api/setcolor";
+<script	lang="ts">
+	import Colors from "./Colors.svelte";
+
+	let url	= "/api/setcolor";
 	let possiblePatterns = [
-                {name: "Solid", text: "Solid", formElements: [
-                	{name: "color", type: "color", label: "Color", value: "#000000"},
-                ]},
-                {name: "Collide", text: "Collide", formElements: [
-                	{name: "left_color", type: "color", label: "Left Color", value: "#000000"},
-                	{name: "right_color", type: "color", label: "Right Color", value: "#000000"},
-                	{name: "conjoined_color", type: "color", label: "Conjoined Color", value: "#000000"},
-                ]},
-                {name: "Fade", text: "Fade", formElements: [
-                	{name: "color", type: "color", label: "Color", value: "#000000"},
-                ]},
-                {name: "MovingPixel", text: "MovingPixel", formElements: [
-                	{name: "color", type: "color", label: "Color", value: "#000000"},
-                ]},
-                {name: "MovingRainbow", text: "MovingRainbow", formElements: [
-                	{name: "width", type: "number", label: "Width", value: "4"},
-                	{name: "forward", type: "checkbox", label: "More Forward?", value: ""},
-                ]},
-                {name: "Orb", text: "Orb", formElements: [
-                	{name: "color", type: "color", label: "Color", value: "#000000"},
-                	{name: "center_width", type: "number", label: "Center Width", value: "1"},
-                	{name: "backoff_width", type: "number", label: "Backoff Width", value: "0"},
-                ]},
-                {name: "Flashing", text: "Flashing", formElements: [
-			{name: "color", type: "color", label: "Color1", value: "#000000"},
-			{name: "color", type: "color", label: "Color2", value: "#000000"},
-			{name: "color", type: "color", label: "Color3", value: "#000000"},
-			{name: "color", type: "color", label: "Color4", value: "#000000"},
-			{name: "color", type: "color", label: "Color5", value: "#000000"},
-			{name: "width", type: "number", label: "Width", value: "1"},
-                ]},
+		{name: "Solid",	text: "Solid", formElements: [
+			{name: "color",	type: "color", label: "Color", value: "#000000"},
+		]},
+		{name: "Collide", text:	"Collide", formElements: [
+			{name: "left_color", type: "color", label: "Left Color", value:	"#000000"},
+			{name: "right_color", type: "color", label: "Right Color", value: "#000000"},
+			{name: "conjoined_color", type:	"color", label:	"Conjoined Color", value: "#000000"},
+		]},
+		{name: "Fade", text: "Fade", formElements: [
+			{name: "color",	type: "color", label: "Color", value: "#000000"},
+		]},
+		{name: "MovingPixel", text: "MovingPixel", formElements: [
+			{name: "color",	type: "color", label: "Color", value: "#000000"},
+		]},
+		{name: "MovingRainbow",	text: "MovingRainbow", formElements: [
+			{name: "width",	type: "number",	label: "Width",	value: "4"},
+			{name: "forward", type:	"checkbox", label: "More Forward?", value: ""},
+		]},
+		{name: "Orb", text: "Orb", formElements: [
+			{name: "color",	type: "color", label: "Color", value: "#000000"},
+			{name: "center_width", type: "number", label: "Center Width", value: "1"},
+			{name: "backoff_width",	type: "number",	label: "Backoff	Width",	value: "0"},
+		]},
+		{name: "Flashing", text: "Flashing", formElements: [
+			{name: "color",	type: "colors",	label: "Color",	value: []},
+			// {name: "color", type: "color", label: "Color1", value: "#000000"},
+			// {name: "color", type: "color", label: "Color2", value: "#000000"},
+			// {name: "color", type: "color", label: "Color3", value: "#000000"},
+			// {name: "color", type: "color", label: "Color4", value: "#000000"},
+			// {name: "color", type: "color", label: "Color5", value: "#000000"},
+			{name: "width",	type: "number",	label: "Width",	value: "1"},
+		]},
 	];
 	let selectedPattern = possiblePatterns[0];
 
 	function hexToRgb(hex) {
-		// Adapted from https://stackoverflow.com/a/5624139
-		var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+		// Adapted from	https://stackoverflow.com/a/5624139
+		var result = /^#?([a-f\d]{1,2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+		console.log(hex);
 		result.splice(0, 1);
-		return result ? result.map(r => parseInt(r, 16)) : null;
+		return result ?	result.map(r =>	parseInt(r, 16)) : null;
 	}
 
 	function getFormData() {
-		var ret = {};
+		var ret	= {};
 		ret[selectedPattern.name] = selectedPattern.formElements.map(x => {
 			switch(x.type) {
 				case "color":
@@ -55,6 +59,10 @@
 				case "checkbox":
 					return x.value === "on";
 					break;
+				case "colors":
+					console.log(x);
+					return x.value.map(hexToRgb);
+					break;
 				default:
 					return x.value;
 			}
@@ -62,11 +70,11 @@
 		return ret;
 	}
 
-	function handleSubmit() {
+	function handleSubmit()	{
 		const response = fetch(url, {
-			method: 'POST',
+			method:	'POST',
 			headers: {
-				'Content-Type': 'application/json'
+				'Content-Type':	'application/json'
 			},
 			body: JSON.stringify(getFormData())
 		}).then(r => console.log(response));
@@ -74,14 +82,18 @@
 </script>
 
 <form on:submit|preventDefault={handleSubmit}>
-	<select bind:value={selectedPattern}>
-		{#each possiblePatterns as p}
-			<option value={p}>{p.text}</option>
+	<select	bind:value={selectedPattern}>
+		{#each possiblePatterns	as p}
+			<option	value={p}>{p.text}</option>
 		{/each}
 	</select>
 	{#each selectedPattern.formElements as fe}
 		<label for={fe.name}>{fe.label}</label>
-		<input type={fe.type} name={fe.name} on:input={(e) => fe.value = e.target.value} />
+		{#if fe.type === "colors"}
+			<Colors	bind:value={fe.value}/>
+		{:else}
+			<input type={fe.type} name={fe.name} on:input={(e) => fe.value = e.target.value} />
+		{/if}
 	{/each}
-	<button type="submit">Submit</button>
+	<button	type="submit">Submit</button>
 </form>