local canvas = nil

function love.load(arg)
    canvas = love.graphics.newCanvas()
    love.graphics.setCanvas(canvas)

    love.graphics.setColor(1, 1, 1, 1)
    for i = 1, 256 * 256 * 0.75 do
        love.graphics.rectangle("fill", math.random(0, 255), math.random(0, 255, 1, 1)
    end

    love.graphics.setCanvas()

end

function love.graphics.draw()
    love.graphics.draw(canvas, 0, 0)
end