function love.load()
	require "scripts"
	love.graphics.setColor(1,1,1)
	love.keyboard.setKeyRepeat(true)
	love.graphics.setDefaultFilter("nearest") -- good pixel
	window_width = 600
	window_height = 600
	t = 0
	TimeDone = false
	BackgroundColor = {0,0,0}
	BackgroundTimer = 0
	BackgroundPeriod = 0.1
	EnemyTimer = 0
	EnemyPeriod = 0.8
	You = Player:New(1/2*window_width,4/5*window_height)

end

function love.update(dt)
	current_dt = dt

	You:Input()
	for _, obj in pairs(List.Simulate) do
		obj:Step()
	end

	for _, bullet in pairs(List.FriendlyBullet) do
		for _, enemy in pairs(List.Enemy) do
			if bullet:CollisionWith(enemy) then
				if bullet.hits > 0 then
					enemy:Damage(bullet.damage)
					bullet.hits = bullet.hits - 1
					if bullet.hits <= 0 then
						bullet:Kill()
					end
				end
			end
		end
	end

	for _, bullet in pairs(List.EnemyBullet) do
		if bullet:CollisionWith(You) then
			if bullet.hits > 0 then
				You:Damage(bullet.damage)
				bullet.hits = bullet.hits - 1
				if bullet.hits <= 0 then
					bullet:Kill()
				end
			end
		end
	end

	if TimeDone == false then
		t = t + dt
		EnemyTimer = EnemyTimer + dt
		BackgroundTimer = BackgroundTimer + dt
	end

	if EnemyTimer >= 0 then --EnemyPeriod then
		--EnemyTimer = EnemyTimer - EnemyPeriod
		EnemyTimer = -1000000000000
		for i=1, 1 do
			local rand = 1 --math.random(10)
			if rand == 1 then
				local rand_x = math.random(-100,100)
				local rand_y = math.random(-100,100)
			  local x = Shooter:New(1/2*window_width,1/5*window_height)
			else
				local rand_x = math.random(-10,10)
				local rand_y = math.random(-10,10)
				local x = Fang:New(window_width/2+rand_x,window_height/2+rand_y)
			end
		end
	end
end

function love.keypressed(key)

end

function love.draw()
	love.graphics.setColor(BackgroundColor)
	love.graphics.rectangle("fill",0,0,window_width,window_height)
	love.graphics.setColor(1,1,1)
	You:Draw()

	for _, obj in pairs(List.Simulate) do
		obj:Draw()
	end
	for _, enemy in pairs(List.Enemy) do
		if enemy.show_health == true then enemy:DrawHealth() end
	end
	local width = You.max_health*3
	local height = 20
	love.graphics.setColor(1,1,1)
	love.graphics.rectangle("fill",20,10,width, height)
	love.graphics.setColor(0,1,0)
	love.graphics.rectangle("fill",20+1,10+1,You.health/You.max_health*(width)-2, height-2)
	love.graphics.setColor(1,1,1)

	love.graphics.line(0,1/5*window_height,window_height,1/5*window_height)
	love.graphics.rectangle("line",0,0,window_width,window_height)
	-- overlay
	--love.graphics.print(t, 10, 10)
	love.graphics.print(BackgroundTimer, window_width-100, 10)
	love.graphics.print(BackgroundPeriod, window_width-100, 20)
	love.graphics.print(#List.Simulate, window_width-100, window_height-10)
	love.graphics.print(love.timer.getFPS(), 10, window_height-20)
end