ga.background()

ga.background()

function draw()
    ga.background(0.0, 0.0, 0.0, 0.1)
    of.setColor(255,255,0)
    of.circle(of.mouseX(), of.mouseY(), 200, 200)
end

This function permits you to set the color and alpha of the background, in grayscale mode with two parameters (gray,alpha) or in color mode with four parameters (r,g,b,a). All parameters are from 0.0 to 1.0

ga.background(gray,alpha)
ga.background(red,green,blue,alpha)

gray	float: specifies a value between white and black
alpha	float: opacity of the background
red	float: red value
green	float: green value
blue	float: blue value

None