View difference between Paste ID: iRZuQrU1 and wNtwMy03

 m = peripheral.wrap("bottom")
 
 m.setTextScale(0.5)
 x,y = m.getSize()
 print(x..":"..y)
 
 iter = 0
 text = "<====8"
 items = {}
 stars = {}
 starsNbr = 150
 
 function registerStars()
 	stars = {}
 	for i=1,starsNbr do
 		toAdd = {}
 		toAdd["x"] = math.random(1,x)
 		toAdd["y"] = math.random(1,y)
 		table.insert(stars, toAdd)
 	end
 end
 
 function forwardStars()
 	for k,v in pairs(stars) do
-		stars[k]["y"] = stars[k]["y"]+1
+		stars[k]["y"] = stars[k]["y"]-1
 	end
 	for i=1,10 do
 		toAdd = {}
-		toAdd["y"] = 1
+		toAdd["y"] = y
 		toAdd["x"] = math.random(1,x)
 		if math.random(1,100) > 90 then table.insert(stars,toAdd) end
 	end
 end
 
 function drawStars()
 	for k,v in pairs(stars) do
 		m.setCursorPos(v["x"],v["y"])
 		if math.random(1,100) > 70 then m.setTextColor(colors.gray) end
 		m.write(".")
 	end
 end
 
 function redraw()
 	m.clear()
 	m.setTextColor(colors.gray)
 	drawStars()
 	m.setTextColor(colors.lightGray)
 	--for k,v in pairs(items) do
 	--	items[k]["x"] = v["x"]+1
 	--	m.setCursorPos(v["x"],v["y"])
 	--	m.write(text)
 	--	if v["x"] > x then table.remove(items,k) end
 	--end
 end
 
 function addPlot()
 	h = math.random(1,y)
 	add = {}
 	add["x"] = 1
 	add["y"] = h
 	table.insert(items,add)
 end
 
 registerStars()
 while true do
 	iter = iter + 1
 	redraw()
 	os.sleep(0.05)
 	--if iter % 14 == 0 then addPlot() end
 	if iter % 20 == 0 then forwardStars() end
 end