n$$TWO LIGHT SENSOR TIMER PROGRAMpCALIBRATE BOTH SENSORSs-@x)) !TURN ON FLASHLIGHT AND ADJUST THE99 POTENTIOMETER %@ TILL THE MESSAGE JUST CHANGES FROM OFF TO ON  PRESS X TO CONTINUE-@A 6-R:,"@At"@ OFF"@ OFF"@ ON "@ ON  A"@ OFF"@ OFF"@ ON "@ ON CHECK IF X KEY PRESSED F:Ad,"@"A  A`CLEAR LAST KEYSTROKEAdAU ## BREAK BEAM 1 TO START TIMER''CHECK FIRST SENSOR TILL TRIGGERED R:,@ApSTART TIMER"9@'@9@ ,))CHECK SECOND SENSOR UNTIL TRIGGERED6 R:,"@A ; A@cc TIME IS ++F:@,$AU$AU,%+F:@,$AU,%+F:@ ,,,'@`SECONDS D:CH12PR1.BAS