diff --git a/src/main.rs b/src/main.rs
index e9e1c5e..61e9d8a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -218,6 +218,27 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut hash: HashMap<robot::Position, u32> = HashMap::new();
     create_hash_map(&robot_pool, &mut hash);
 
+    loop {
+        let mut piouff: u32 = 0;
+        for r in &mut robot_pool {
+            if robot::is_piouff(&r) {
+                piouff += 1;
+            } else {
+                hash.remove(&r.p);
+                r.execute_instruction();
+                check_map(&r, &world)?;
+                check_collisions(&r, &hash)?;
+                hash.insert(robot::Position { x: r.p.x, y: r.p.y }, r.id);
+            }
+        }
+        if piouff == robot_pool.len() as u32 {
+            break;
+        }
+    }
+    for r in &robot_pool {
+        println!("Robot id: {}: Final position: ({}, {})", r.id, r.p.x, r.p.y);
+    }
+
     Ok(())
 }
 
diff --git a/src/robot.rs b/src/robot.rs
index 7ab8c5a..25edfc3 100644
--- a/src/robot.rs
+++ b/src/robot.rs
@@ -69,6 +69,14 @@ pub fn is_instructions(v: &Vec<char>) -> bool {
     true
 }
 
+/// Check if a robot is piouff.
+pub fn is_piouff(r: &Robot) -> bool {
+    if r.i.len() == 0 {
+        return true;
+    }
+    false
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -121,4 +129,19 @@ mod tests {
         let v = vec!['F', 'R', 'L', 'Z'];
         assert!(is_instructions(&v));
     }
+
+    #[test]
+    fn test_piouf() {
+        let mut r: Robot = Robot::new(
+            0,
+            Orientation::N,
+            Position { x: 1, y: 2 },
+            vec!['R', 'F', 'L', 'F'],
+        );
+        r.i.pop();
+        r.i.pop();
+        r.i.pop();
+        r.i.pop();
+        assert!(is_piouff(&r));
+    }
 }