function love.load() -- do global variables get declared here?
	windowwidth = 1000
	windowheight = 1000
	sucess = love.window.setMode(windowwidth, windowheight)
	x = 30
	y = 50
	z = math.sin(math.pi/3)
	cx = 0
	cy = 0
	a = 20
	b = 1/4
	ps = 0
end

function love.update(dt)


	local m = math.pow(2, dt)
	if love.keyboard.isDown("up") then
		a = a*m
	end
	if love.keyboard.isDown("down") then
		a = a/m
	end
	if love.keyboard.isDown("right") then
		b = b*m
	end
	if love.keyboard.isDown("left") then
		b = b/m
	end
	if love.keyboard.isDown("a") then
		ps = ps - 1
	end
	if love.keyboard.isDown("s") then
		ps = ps + 1
	end

end




function love.draw() -- render to window
	-- y = asin(bx + c)
	love.graphics.setColor(200/255, 215/255, 0/255)
	delthe = math.pi/60 -- 3 degrees
	--a = 20
	x = 0
	p = 1
	odeg = math.pi/180

	for theta = -32*math.pi, 32*math.pi, odeg do
		love.graphics.line(x + ps, a*math.sin(b*(theta + ps))+windowwidth/2, x+odeg + ps, a*math.sin(b*theta+odeg + ps + 0.1)+windowwidth/2)
		-- phaseshift = 3 for an interesting pattern
		--		love.graphics.line(x, a*math.sin(theta/ps)+windowwidth/2, x+odeg, a*math.sin(theta/ps+odeg)+windowwidth/2)
		x = x + 0.1
		--ps = ps + 0.1
	end

end