This still doesn't work: You are killing the sender in your
callback in the next line! Never kill the sender.
If you take a look at the opal-levels, you will notice that
we just plant a seed which will later kill the oxyd. Here,
you have to work around this.
Even after this, the code fails. You have to add
wo["AllowSingleOxyds"] = true
if you are manipulating oxyds. After this, you have to
make sure yourself, that all colors match afterwards.
One more thing:
For lasers, switchs and triggers, you should definitely