LUA script for game engine.

main.lua

local width = 1600
local height = 900

window.create(width, height, "LuaGame") -- width, height, title
canvas.init();

local ticks = 0
local x = 0
local y = 0
local xBackwards = false
local yBackwards = false

while not window.shouldClose() do
	ticks = ticks + 1

	local size = 100 * math.sin(ticks / window.getFramesPerSecond()) + 200

	if xBackwards then
		x = x - 1
	else
		x = x + 1
	end

	if yBackwards then
		y = y - 1
	else
		y = y + 1
	end

	if x < 0 then
		x = 0
		xBackwards = false
	elseif x > width - size * 2 then
		x = width - size * 2
		xBackwards = true
	end

	if y < 0 then
		y = 0
		yBackwards = false
	elseif y > height - size then
		y = height - size
		yBackwards = true
	end


	canvas.reset()

	canvas.beginFrame(width, height, 1.0)

	canvas.beginPath()
	canvas.rect(x, y, size * 2, size) -- x, y, width, height
	canvas.fillColor(1.0, 0.0, 0.0, 1.0) -- red, green, blue, alpha floats
	canvas.fill()

	canvas.endFrame();

	window.update()
end