Oops, the camera should be like this instead-- because I made the array X5 to be
'zero-based', meaning the first value is held in array location X5[0], and runs
up to location X5[99]
#declare Cam3 = camera {
location <30,20-YY,5+X5[frame_number - 1]>
look_at <0,10-YY,5+X5[frame_number - 1]>
orthographic
}
