I am continuing my work in reaction timers. I need most of my functions to run in sequence. I have run into a problem with
wait(1);
Each function has two or three
while(!key_any){wait(1);}
to allow subjects to read instructions and continue the task.
I have tried both wait_for() and proc_status directly without success.

I have succeeded with messy kludge coding. I am wondering if there is an elegant and general way to control multi-tasking.
Thank you.