Trigger if number is a multiple of 4 exactly (modulo?)

I want to display a button if a number is exactly a multiple of 4+1 (after the initial 8), so every time the number is 9, 13, 17, 21, 25, etc, but not if it's between those, so I don't want it to display if the number is 10-12 inclusive, 14-16 inclusive, 18-20 inclusive, I'm sure I can do this with mod, but not quite sure how to input this in the expression editor?

Example from 8 to 100 put into an array.

System| For i from 8 to 100 -> Array| push back loopindex+1 on X axis

System| loopindex%4

Edit:

If you want it the the other way round:

Array| For each X element -> do something.

Array| Array.CurValue>8

Array|(Array.CurValue-1)%4=0

A slightly simpler solution without using arrays:

Use System condition|Compare two values:

If (value-1%4) is equal to 0

and value > 8

Set button visible

else Set button invisible

A slightly simpler solution without using arrays:

Use System condition|Compare two values:

If (value-1%4) is equal to 0

and value > 8

Set button visible

else Set button invisible

Hmm, I tried

Inventory.Width-1%4 = 0

But it only seems to work when there's 1 item in the array (after having 0 items in the array) but not again on 5 items?