matrix

term.setTextColor(colors.lime)
local size={term.getSize()}
local tPixels={}
for x=1,size[1]-1 do
    tPixels[x]={}
    for y=1,size[2] do
        tPixels[x][y]=' '
    end
end
local function render()
    term.clear()
    term.setCursorPos(1,1)
    for y=1,#tPixels[1] do
        if y~=1 then
            print('')
        end
        for x=1,#tPixels do
            if tPixels[x][y+1] == ' ' and tPixels[x][y] ~= ' ' then
                term.setTextColor(colors.white)
            else
                term.setTextColor(colors.lime)
            end
            write(tPixels[x][y])
        end
    end
end
local function cycle()
    for x=1,#tPixels do
        for y=#tPixels[x],2,-1 do
            tPixels[x][y]=(tPixels[x][y-1]==' ' and ' ') or ((tPixels[x][y]~=' ' and tPixels[x][y]) or string.char(math.random(32,126)))
        end
        --[[for x=1,#tPixels do
        local intC=nil
        for y=2,5 do
            if tPixels[x][y]==' ' then
                intC=true
            end
        end
        if not intC then
            tPixels[x][1]=' '
        end
        end]]
    end
end
local function create()
    tPixels[math.random(1,#tPixels)][1]=string.char(math.random(32,126))
    tPixels[math.random(1,#tPixels)][1]=' '
    tPixels[math.random(1,#tPixels)][1]=' '
end
local bRunning=true
local i = 1
while bRunning do
    --i = (i + 1) % 3
    cycle()
    --if i == 1 then
        create()
    --end
    render()
    sleep(0.1)
end