Basically what this formula does is move the sprite right/left and up/down the way you want, in this case, set to 10:13. How this works in the most inefficient way possible is it decoded 10:13 into 10 and 13, and then uses trigonometry to determine the angles 90 and 0 (even though technically it will always be 90 and 0) to then get the sprite to point in the direction specified and then moving it.
If anyone can actually find a use of this formula I will honestly be impressed. I literally just challenged myself to move a sprite up/down and left/right in the direction I chose without using the change x, set x, change y, or set y, and I only let myself use as few move blocks as possible (I technically used 7, but since you have to put in the x values you want the sprite to move from that could be argued as 9)
