You may synchronize your program with an internal clock.

Calling SYNC with an given cycle time cycl starts the internal clock.

Each call to SYNC waits, until the next cycle of the internal clock is finished.

Example:

SYNC 1.0 FOR I=0 TO 50 IF I % 2= 0 THEN ? "tick "; ELSE ? "tack" ENDIF SYNC NEXT

The program will write a "tick" or a "tack" every second, independ of the time, the printing needs.