startup.lua

local nfte = require "nfte"

local mon = peripheral.find("monitor")
if mon then
    mon.setTextScale(0.5)
    term.redirect(mon)
end

local scr_x, scr_y = term.getSize()

local logo = {
    xvel = 1, --math.random(0, 3) - 1.5,
    yvel = 1, --math.random(0, 3) - 1.5,
    x = scr_x / 2,
    y = scr_y / 2,
    img = nfte.loadImage("dvdlogo.nft")
}

local render = function()
    term.clear()
    nfte.drawImage(logo.img, math.floor(logo.x), math.floor(logo.y))
end

local max, min = math.max, math.min

local tick = function()
    local imgXsize, imgYsize = nfte.getSize(logo.img)
    local xWall = scr_x - imgXsize + 1
    local yWall = scr_y - imgYsize + 1
    logo.x = min(max(logo.x + logo.xvel, 1), xWall)
    logo.y = min(max(logo.y + logo.yvel, 1), yWall)

    if math.floor(logo.x) == 1 or math.floor(logo.x) == xWall then
        logo.xvel = -logo.xvel
    end
    if math.floor(logo.y) == 1 or math.floor(logo.y) == yWall then
        logo.yvel = -logo.yvel
    end
    render()
end

while true do
    tick()
    sleep(0.05)
end