4,3,0,"spr\spr_bg03_1.png",0,60
M,1,10450,10900,0,60,0,50
M,1,10900,11350,0,50,0,60
M,1,11350,11800,0,60,0,50
M,1,11800,12200,0,50,0,60
F,0,10450,12200,1,1
changed to
4,3,0,"spr\spr_bg03_1.png",0,60
L,10450,2
M,1,0,175,0,60,0,50,0,60
F,0,10450,12200,1,1
which works fine, then i change both 60 to 70
4,3,0,"spr\spr_bg03_1.png",0,60
L,10450,2
M,1,0,175,0,70,0,50,0,70
F,0,10450,12200,1,1
which it then doesn't animate properly, even if i change them back to 60, even if i restart edit mode
the only way i could fix was to change back to original script, load, then change to loop again
edit: "doesn't animate properly":
supposed to move up and down twice slowly, but after bug, it jumps twice really quickly (in about half the time, i think)