Change Size Repeatedly

This script repeatedly changes the size of the item to something random between 0.420 and 6.9 every 0.69/3 seconds.

registerType("Vector3")

function getRandomNumber(min, max)
  return math.random() * (max - min) + min
end

function changeSizeToSmthRand()
	local transform = getCurrentItem().transform
	local isFacingBackwards = transform.lossyScale.x < 0
	local newScale = createInstance("Vector3")
    	newScale.x, newScale.y, newScale.z = getRandomNumber(0.420, 6.9), getRandomNumber(0.420, 6.9), 1
	if isFacingBackwards then
		newScale.x = -newScale.x
	end
    	transform.localScale = newScale
end

function changeSizeOverAndOver()
	changeSizeToSmthRand()
	invokeAfterTime(0.69 / 3, changeSizeOverAndOver, {})
end

changeSizeOverAndOver()