diff --git a/wash/src/wash/control/Wash.java b/wash/src/wash/control/Wash.java
index 4c29e4a..0f0f4bf 100644
--- a/wash/src/wash/control/Wash.java
+++ b/wash/src/wash/control/Wash.java
@@ -20,17 +20,19 @@ public class Wash {
         water.start();
         spin.start();
 
-        ActorThread<WashingMessage> t = null;
+        // Instantiated to avoid nullchecking in the interrupt inside the loop
+        ActorThread<WashingMessage> t = new EmptyProgram();
 
         outer: while (true) {
             int n = io.awaitButton();
+            t.interrupt(); // Immediately abort previous action, t != null here
             System.out.println("user selected program " + n);
 
             // if the user presses buttons 1-3, start a washing program
             // if the user presses button 0, and a program has been started, stop it
 
             switch (n) {
-                case 0 -> t = new WashingProgramN(io, temp, water, spin);
+                case 0 -> t = new WashingProgramStop(io, temp, water, spin);
                 case 1 -> t = new WashingProgram1(io, temp, water, spin);
                 case 2 -> t = new WashingProgram2(io, temp, water, spin);
                 case 3 -> t = new WashingProgram3(io, temp, water, spin);