startup

m = peripheral.wrap("back")

m.setTextScale(0.5)
x,y = m.getSize()
print(x..":"..y)

iter = 0
text = {}

items = {}
stars = {}
starsNbr = 200

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]["x"] = stars[k]["x"]+1
    end
    for i=1,10 do
        toAdd = {}
        toAdd["x"] = 1
        toAdd["y"] = math.random(1,y)
        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.lightGray) else m.setTextColor(colors.gray) end
        m.write(".")
    end
end

function redraw()
    m.clear()
    m.setTextColor(colors.gray)
    drawStars()
    m.setTextColor(colors.green)
 for k,v in ipairs(items) do
     items[k]["x"] = v["x"]+1
        m.setCursorPos(v["x"],v["y"])
  randText = math.random(1,3)
  if randText < 2 then
    text = "Airelad"
  elseif randText > 2 then
    text = "wormboy9000"
  else
    text = "_Mush_"
  end
        m.write(text)
        x,y = m.getSize()
        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()
addPlot()
while true do
    iter = iter + 1
    redraw()
    os.sleep(0.5)
    if iter % 14 == 0 then addPlot() end
    if iter % 20 == 0 then forwardStars() end
end