thanks, i just downloaded TheAnT, i'll check it out. I figured this formula out last night and added it to my sliding door, to make it move and stop @ 76":
IF GLOB_FRAME_NR>=5 AND GLOB_FRAME_NR<=20 THEN
ADDX GLOB_FRAME_NR*4"
ENDIF
IF GLOB_FRAME_NR>=21 THEN
ADDX 76"
ENDIF
works great. thanks for the help