FOR SIN/COS BG
Step 1.
Download @Awesome_E ‘s shortcut This Siri Shortcut Can Modify your Projects | 𝓐𝔀𝓮𝓼𝓸𝓶𝓮_𝓔
Step 2:
Find Create clones block in custom ability.
Step 3:
When game starts
create clone 768 times
When object is cloned
change y by self clone index
set speed to 1000000
(Repeat 1024 times
{Draw a tail color [your color here] width 1
change x by 1})