function love.load()
    windowwidth = 1000
    windowheight = 1000
    sucess = love.window.setMode(windowwidth, windowheight)
    x = 30
    y = 50
    z = math.sin(math.pi/3)
    cx = 0
    cy = 0
end

function love.update(dt) -- added dt as a parameter ... is dt 1/framerate?
    cx = cx + dt
    cy = cy + dt
end

function love.draw() -- render to window
    love.graphics.setColor(200/255, 215/255, 0/255)

    love.graphics.setColor(145/255, 12/255, 230/255)
    love.graphics.rectangle("line", x, y, 100, 100)
    love.graphics.setColor(0/255, 12/255, 230/255)
    love.graphics.print("the sin of 60 is: " .. z, 100, 300)
    love.graphics.setColor(0/255, 200/255, 230/255)
    love.graphics.print("here is a line: ", 100, 400)
    love.graphics.setColor(0/255, 200/255, 100/255)
    love.graphics.line(100,400, math.cos(100*math.pi/3) + 200, math.sin(100*math.pi/3) + 200)
    for theta = 0, 2*math.pi, delthe do -- you must specify the incrementation or it will assumed to be 1

        r = 100
        a = 1 -- amplitude of the waves
        b = 2

        love.graphics.setColor(200/255, 0/255, 100/255)

        love.graphics.line(r*math.cos(a*theta) + windowwidth/2, r*math.sin(a*theta) + windowwidth/2, r*math.cos(a*theta + a*delthe) + windowwidth/2, r*math.sin(a*theta + a*delthe) + windowwidth/2)
    end

    for theta = 0, 2*math.pi, delthe do
        r = 2*math.cos(2*theta)
        a = 100
        b = 2

        love.graphics.setColor(100/255, 0/255, 200/255)
        love.graphics.line(a*r*math.cos(theta) + windowwidth/2, a*r*math.sin(theta) + windowheight/2, a*r*math.cos(theta + delthe) + windowwidth/2, a*r*math.sin(theta+delthe) + windowheight/2)
    end

    for theta = 0, 2*math.pi, delthe do
        r = 2*math.sin(3*theta)
        a = 100
        b = 2

        love.graphics.setColor(2/255, 200/255, 50/255)
        love.graphics.line(a*r*math.cos(theta) + windowwidth/2, a*r*math.sin(theta) + windowheight/2, a*r*math.cos(theta + delthe) + windowwidth/2, a*r*math.sin(theta+delthe) + windowheight/2)
    end

    for theta = 0, 2*math.pi, delthe do
        r = math.sin(1/3*theta)
        a = 100
        b = 2

        love.graphics.setColor(2/255, 200/255, 155/255)
        love.graphics.line(a*r*math.cos(theta) + windowwidth/2, a*r*math.sin(theta) + windowheight/2, a*r*math.cos(theta + delthe) + windowwidth/2, a*r*math.sin(theta+delthe) + windowheight/2)
    end
    -- 8 leaves
    for theta = 0, 2*math.pi, delthe do
        r = math.sin(4*theta)
        a = 100
        b = 2
        --delthe = math.pi/60 -- 3 degrees
        love.graphics.setColor(230/255, 0/255, 50/255)
        love.graphics.line(a*r*math.cos(theta) + windowwidth/2, a*r*math.sin(theta) + windowheight/2, a*r*math.cos(theta + delthe) + windowwidth/2, a*r*math.sin(theta+delthe) + windowheight/2)
    end

    love.graphics.print("x: " .. cx .. "y: " .. cy, cx, cy)
    love.graphics.circle("fill", cx, cy, 2)
end

function love.keypressed(key)
    if key == "space" then
        x = math.random(100, 500)
        y = math.random(100, 500)
    end
end