No it's c_script. But I forgot something: var temper; over the starter.
I'm using this var by default so I forgot the it's not declared in your code.

EDIT: And another thing I forgot:

It will may be better to do it like this:
IF (key_space == 1) { screen_syn.VISIBLE = OFF; Goto finish; }

This will replace the old IF structure.

But you have to declare a label to jump to:

finish :

Put this under the end of the While (1) { } structure.