--Space with stars
local gc=love.graphics
local rectangle=gc.rectangle
local rnd=math.random
local back={}

local stars
local W,H
function back.init()
	stars={}
	BG.resize(SCR.w,SCR.h)
end
function back.resize(w,h)
	W,H=w+20,h+20
	local S=stars
	for i=1,1260,5 do
		local s=rnd(26,40)*.1
		S[i]=s*SCR.k			--Size
		S[i+1]=rnd(W)-10		--X
		S[i+2]=rnd(H)-10		--Y
		S[i+3]=(rnd()-.5)*.01*s	--Vx
		S[i+4]=(rnd()-.5)*.01*s	--Vy
	end
end
function back.update()
	local S=stars
	--Star moving
	for i=1,1260,5 do
		S[i+1]=(S[i+1]+S[i+3])%W
		S[i+2]=(S[i+2]+S[i+4])%H
	end
end
function back.draw()
	gc.clear(.1,.1,.1)
	if not stars[1]then return end
	gc.translate(-10,-10)
	gc.setColor(1,1,1,.6)
	for i=1,1260,5 do
		rectangle('fill',stars[i+1],stars[i+2],stars[i],stars[i])
	end
	gc.translate(10,10)
end
function back.discard()
	stars=nil
end
return back