Rotation of a sphere

SphereRotation.lua

-- Sphere rotation program

-- main.lua first

-- Use this function to perform your initial setup
function setup()
    
--  displayMode(FULLSCREEN)
    ballX =3D 300
    ballY =3D 300
    diameter =3D 200
    rot =3D 0
    watch("x")
    watch("y") 
    parameter("rot",0,90)
end

-- This function gets called once every frame
function draw()
    -- This sets a dark background color 
    background(86, 37, 90, 255)
    strokeWidth(5)
    stroke(186, 218, 20, 255)
    Sphere:draw(ballX,ballY,ballZ,diameter)


end


-- Sphere.lua to follow

Sphere =3D class()

function Sphere:init()
    -- you can accept and set parameters here
    self.x =3D x
    self.y =3D y
    self.z =3D z
    self.diameter =3D 50
end

function Sphere:draw(x,y,diameter,diameter)
    -- Codea does not automatically call this method
    pushStyle()
    pushMatrix()
    fill(48, 181, 200, 255)
    stroke(7, 8, 7, 255)
    strokeWidth(1)
    ellipseMode(CENTER)
    ellipse(x,y,diameter,diameter)
    noFill()
    diff =3D diameter/10    
    rotate(rot)
    for loop =3D 1, 9 do
        angle =3D loop*diff
        ellipse(x,y,diameter,angle)
        ellipse(x,y,angle,diameter)  
    end   
    popMatrix()
    popStyle() 
end