added queue structure, add to main file

src/main.rs

@@ -11,6 +11,7 @@ mod app;
 mod config;
 mod generate;
 mod request;
+mod queue;
 
 const NUM_LEDS: usize = 150;
 

src/queue.rs

@@ -0,0 +1,31 @@
+struct Queue<T> {
+    pub queue: Vec<T>
+}
+
+impl<T> Queue<T> {
+    pub fn new() -> Self {
+        Queue {
+            queue: Vec::new()
+        }
+    }
+
+    pub fn enqueue(&mut self, item: T) {
+        self.queue.push(item)
+    }
+
+    pub fn dequeue(&mut self) -> T {
+        self.queue.remove(0)
+    }
+
+    pub fn length(&self) -> usize {
+        self.queue.len()
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.queue.is_empty()
+    }
+
+    pub fn peek(&self) -> Option<&T> {
+        self.queue.first()
+    }
+}