local count=0
BGblockList={}for i=1,16 do BGblockList[i]={}end

function getNewBlock()
	count=count+1
	if count==17 then count=1 end
	local t=BGblockList[count]
	t.bn,t.size=rnd(7),2+3*rnd()
	t.b=blocks[t.bn][rnd(0,3)]
	t.x=rnd(-#t.b[1]*t.size*30+100,1180)
	t.y=-#t.b*30*t.size
	t.v=t.size*(1+rnd())
	return t
end