diff --git a/cluster.yml b/cluster.yml
index 940f8e7..bedb5d5 100644
--- a/cluster.yml
+++ b/cluster.yml
@@ -1,12 +1,12 @@
 nodes:
   - name: node1
-    program: ./programs/node1.hal
+    program: ./programs/noop.hal
   - name: node2
-    program: ./programs/node2.hal
+    program: ./programs/noop.hal
   - name: node3
-    program: ./programs/node3.hal
+    program: ./programs/noop.hal
   - name: node4
-    program: ./programs/node4.hal
+    program: ./programs/noop.hal
 connections:
   - source_node: node1
     source_port: 3
diff --git a/programs/noop.hal b/programs/noop.hal
new file mode 100644
index 0000000..4d5abcc
--- /dev/null
+++ b/programs/noop.hal
@@ -0,0 +1,2 @@
+01 START
+02 STOP
\ No newline at end of file