I’ve seen few people stating : “I tried to make a background, but it didn’t work”. This is why I made this article. (How this come anyone did not make it before)
Basically, movement of bg layers depends on numbers X and Y on layer properties. They say in how many tiles the bg will scroll after Jazz crosses one tile.
Example : You made few tiles on layer 5 and gave them X=0.5 Y=0.25 properties. By now, if Jazz crosses one tile horizontaly, layer 5 won’t move along with layer 4, but it’ll move only through half of tile (0.5 is half and always will be. Learn math.) With Y=0.30 property, the tile will move only through 0.30 of tile vertically, if Jazz jumps/falls.
Auto Speed don’t require Jazz moving, as it’ll move automatically.
Example : You gave our tiles on layer 5 AX=1 AY=0.5 properties. Therefore, they’ll move horizontally one tile per second and vertically half tile per second.
Still, those properties works on every layer (except 4), and remember, you can insert negative amount of numbers. Therefore, if layer 5 will have X=-1 property, and Jazz goes to left, the tile won’t go to right, but left. If Jazz will backtrack and go right, tile will move to right too. Same with Y property.
So, does it really seems that hard? Not. Until you are Voldard.
EDIT : Few changes in negative properties part as whole stuff with them was wrong.
Eat your lima beans, Johnny.