Render one frame in setup

main.lua

function setup()
    background(0)
    
    -- Render once into an image the size of the screen
    img = image(WIDTH,HEIGHT)
        
    setContext(img)
    
    stroke(255)
    strokeWidth(5)
    fill(227, 106, 106, 255)
    ellipse(WIDTH/2, HEIGHT/2, 500)
    
    setContext()
end

function draw()
    -- Just draw the image we rendered into in setup()
    spriteMode(CORNER)    
    sprite(img, 0, 0)
end