How do I fix scaling in script so that it doesn't glitch on top of player?

I can't seem to figure this out and it's a major issue for my game, but how do I fix the scaling? I have the blocks scale up or down based on it's value within it, but whenever someone changes the value higher while standing on it, the block glitches and goes above the player's head.

MyValue.Changed:connect(function()
    if White.Value == 0 then
        script.Parent.Material = "Brick"
    end
    if Red.Value > 0 then
        script.Parent.BrickColor = BrickColor.new(332)
    elseif Blue.Value > 0 then
        script.Parent.BrickColor = BrickColor.new(1011)
    elseif Green.Value > 0 then
        script.Parent.BrickColor = BrickColor.new(304)
    elseif Yellow.Value > 0 then
        script.Parent.BrickColor = BrickColor.new(1017)
        print(script.Parent.BrickColor)
    end
    local NewSize = ((math.log(MyValue.Value+2))*3) + 100
    MyParent.Size = Vector3.new(20, NewSize, 20)
end)

Here's the simple part that controls the scaling for the guy asking for it.