diff --git a/simulator/src/main.rs b/simulator/src/main.rs
index b433c83..166d98e 100644
--- a/simulator/src/main.rs
+++ b/simulator/src/main.rs
@@ -167,55 +167,59 @@ impl Food {
     }
 }
 
-async fn run_simulation() -> (i32, i32) {
-    let mut watchdog = 0; // iterations since something interesting
-    let mut robots = Vec::new();
+struct Simulation {
+    robots: Vec<Robot>,
+    food: Vec<Food>,
+    craters: Vec<(f32, f32, f32, Color)>,
+    new_craters: Vec<(f32, f32, f32, Color)>,
+    watchdog: i32,
+    score: HashMap<[u32;4], i32>,
+}
 
-    let mut craters: Vec<(f32, f32, f32, Color)> = Vec::new();
-    let mut new_craters: Vec<(f32, f32, f32, Color)> = Vec::new();
+impl Simulation {
+    fn new() -> Self {
+        let watchdog = 0; // iterations since something interesting
+        let mut robots = Vec::new();
 
-    let mut score = HashMap::new();
+        let craters: Vec<(f32, f32, f32, Color)> = Vec::new();
+        let new_craters: Vec<(f32, f32, f32, Color)> = Vec::new();
 
-    for i in 5..20 {
-        robots.push(Robot::new(Vec2 { x: 100.0, y: i as f32*50.0 }, BLUE));
-        robots.push(Robot::new(Vec2 { x: 1200.0, y: i as f32*50.0 }, RED));
+        let score = HashMap::new();
+
+        for i in 5..20 {
+            robots.push(Robot::new(Vec2 { x: 100.0, y: i as f32*50.0 }, BLUE));
+            robots.push(Robot::new(Vec2 { x: 1200.0, y: i as f32*50.0 }, RED));
+        }
+
+        let mut food = Vec::new();
+
+        for _ in 0..120 {
+            let x = rand::gen_range(200, 1100) as f32;
+            let y = rand::gen_range(200, 900) as f32;
+            food.push(Food::new(Vec2 { x, y }));
+        }
+        Self { robots, food, craters, new_craters, watchdog, score }
     }
 
-    let mut food = Vec::new();
-
-    for i in 0..120 {
-        let x = rand::gen_range(200, 1100) as f32;
-        let y = rand::gen_range(200, 900) as f32;
-        food.push(Food::new(Vec2 { x, y }));
-    }
-
-    //for j in 5..20 {
-    //    for i in 5..20 {
-    //        food.push(Food::new(Vec2 { x: i as f32*60.0, y: j as f32*50.0 }));
-    //    }
-    //}
-
     fn color_hash(color: Color) -> [u32; 4] {
         color.to_vec().to_array().map(|f| f.to_bits())
     }
 
+    fn sim_step(&mut self) -> Option<(i32, i32)>{
+        let Simulation { robots, food, craters, new_craters, watchdog, score } = self;
 
-    let mut loo = 1;
-    loop {
-        let rendered = loo %490 == 0;
-
-        for food in &mut food{
+        for food in &*food{
             if let Some(team) = food.detect(robots.iter()) {
                 if food.living() {
-                    score.entry(color_hash(team)).and_modify(|s| *s +=1 ).or_insert(1);
+                    score.entry(Self::color_hash(team)).and_modify(|s| *s +=1 ).or_insert(1);
                     food.kill();
-                    watchdog = 0;
+                    *watchdog = 0;
                 }
             }
         }
 
-        food = food.into_iter().filter(Mortal::living).collect(); // remove dead food
-        robots = robots.into_iter().filter(Mortal::living).collect(); // remove dead robots
+        food.retain(Mortal::living);
+        robots.retain(Mortal::living);
 
         let mut sensors = Vec::new();
         for robot in &*robots {
@@ -257,37 +261,59 @@ async fn run_simulation() -> (i32, i32) {
                 robot.weapon(peers);
             }
         }
+
+        *watchdog += 1;
+        if food.is_empty() || *watchdog > 1000 {
+            let red = score.get(&Self::color_hash(RED)).unwrap_or(&0);
+            let blu = score.get(&Self::color_hash(BLUE)).unwrap_or(&0);
+            return Some((*red, *blu));
+        }
+        None
+    }
+
+    async fn render(&mut self) {
+        let Simulation { robots, food, craters, new_craters, watchdog: _, score } = self;
+
+        clear_background(LIGHTGRAY);
+        for crater in &*new_craters {
+            draw_circle(crater.0, crater.1, crater.2, crater.3);
+        }
+        craters.append(&mut *new_craters);
+        for crater in &*craters {
+            draw_circle(crater.0, crater.1, crater.2, Color::new(0.75, 0.75, 0.75, 1.0));
+        }
+        for food in &*food {
+            food.draw();
+
+        }
+        for robot in &*robots {
+            robot.draw();
+        }
+        draw_text(format!("RED: {}", score.get(&Self::color_hash(RED)).unwrap_or(&0)), 20.0, 20.0, 30.0, DARKGRAY);
+        draw_text(format!("BLUE: {}", score.get(&Self::color_hash(BLUE)).unwrap_or(&0)), 20.0, 40.0, 30.0, DARKGRAY);
+        next_frame().await // TODO: framerate cap
+    }
+}
+
+async fn run_simulation() -> (i32, i32) {
+    let mut sim = Simulation::new();
+
+
+
+    let mut loo = 1;
+    loop {
+        let rendered = loo % 20 == 0;
+        let result = sim.sim_step();
         
         if rendered {
-            clear_background(LIGHTGRAY);
-            for crater in &new_craters {
-                draw_circle(crater.0, crater.1, crater.2, crater.3);
-            }
-            craters.append(&mut new_craters);
-            for crater in &craters {
-                draw_circle(crater.0, crater.1, crater.2, Color::new(0.75, 0.75, 0.75, 1.0));
-            }
-            for food in &food {
-                food.draw();
-
-            }
-            for robot in &robots {
-                robot.draw();
-            }
-            draw_text(format!("RED: {}", score.get(&color_hash(RED)).unwrap_or(&0)), 20.0, 20.0, 30.0, DARKGRAY);
-            draw_text(format!("BLUE: {}", score.get(&color_hash(BLUE)).unwrap_or(&0)), 20.0, 40.0, 30.0, DARKGRAY);
+            sim.render().await
         }
+
+        if let Some(result) = result {
+            return result;
+        }
+
         loo += 1;
-        if rendered {
-            next_frame().await // TODO: framerate cap
-        }
-
-        watchdog += 1;
-        if food.is_empty() || watchdog > 1000 {
-            let red = score.get(&color_hash(RED)).unwrap_or(&0);
-            let blu = score.get(&color_hash(BLUE)).unwrap_or(&0);
-            return (*red, *blu);
-        }
     }
 }