Solution By MrMen
value = mod(value + 100, 200)
So like
Change Variable set to mod(Variable+your value, your value * 2)
I am sure i did it once i just forgot how
For example i have variable and i want it to flip between 0 and 100
So like ping pong 0 100 0 100 0 100
I am more than sure i did it with only one formula
But did not write it down
And i don’t remember how
mod(value +100 , 100) leaves it at 0