gistfile1.lua

function ?:init(x)
    -- you can accept and set parameters here
    self.EffectAlpha = 135
    tween(4,self,{EffectAlpha = 0}) 
end

function ?:draw()
    
    -->APPLY THE SIMPLE EFFECT
    fill(5,5,5,self.EffectAlpha)
    
    -->MAKE YOUR BUTTON
    rect(650,-3,100,1014) 
    sprite("whatever you want",WIDTH/2+330,HEIGHT/2,self.EffectAlpha/2)
end