(there might be some DSK files around where you can't find the "ROBOT.BIN" file. The DSK container attached is a version made by @Geco.
In the case you don't have it you nevertheless can run the demo by executing it by loading / running the files in following 10 stepsorder:1. run"clear > 2. run"a1 > 3. run"a2 > 4. run"a3 > 5. run"b1 > 6. run"b2 > 7. run"b3 > 8. run"c1 > 9. run"c2 > 10. run"c3 >11. run"robo)