I removed some of the overlays but it still does not preview
EXT. DESERT LOOP - DAY
@overlay CAMEL1 create
@overlay CAMEL1 opacity 1
@overlay CAMEL2 create
@overlay 5317061566267392_CAMEL2 shifts to 184 206 in zone 1
@overlay 5317061566267392_CAMEL2 scales to 0.442 0.442
@overlay 5317061566267392_CAMEL2 moves to layer 1
@overlay CAMEL3 create
@overlay 5317061566267392_CAMEL3 shifts to 184 206 in zone 1
@overlay 5317061566267392_CAMEL3 scales to 0.442 0.442
@overlay 5317061566267392_CAMEL3 moves to layer 1
@overlay CAMEL4 create
@overlay 5317061566267392_CAMEL4 shifts to 184 206 in zone 1
@overlay 5317061566267392_CAMEL4 scales to 0.442 0.442
@overlay 5317061566267392_CAMEL4 moves to layer 1
@overlay CAMEL5 create
@overlay 5317061566267392_CAMEL5 shifts to 184 206 in zone 1
@overlay 5317061566267392_CAMEL5 scales to 0.442 0.442
@overlay 5317061566267392_CAMEL5 moves to layer 1
@overlay 5317061566267392_CAMEL1 shifts to 184 206 in zone 1
@overlay 5317061566267392_CAMEL1 scales to 0.442 0.442
@overlay 5317061566267392_CAMEL1 moves to layer 1
@pause for 0.1
&overlay CAMEL1 opacity 0 THEN overlay CAMEL2 opacity 1 in 0 THEN overlay CAMEL2 opacity 0 in 0 THEN overlay CAMEL3 opacity 1 in 0 THEN overlay CAMEL3 opacity 0 in 0 THEN overlay CAMEL4 opacity 1 in 0 THEN overlay CAMEL4 opacity 0 in 0 THEN overlay CAMEL5 opacity 1 in 0 THEN overlay CAMEL5 opacity 0 in 0 THEN overlay CAMEL1 opacity 1 in 0 loop INFINITE times