Graph

--Vars-------------------------------------------------------------------
local w,h = term.getSize()
local rng = true
--buffer
local buffer = buf.createBuffer(w,h)
--Graphs
local Graphs = {}
local Cvertex = {math.floor(w/2),math.floor(h/2)}
----------------------------------------------------------------------
local function setupGraph(Xs,Ys,Vx,Vy,Scale) -- X screen, Y screen, X vertex, Y vertex, Bc color, Scale = Add later
    local Xs = Xs or w
    local Ys = Ys or h
    local Vx = Vx or math.floor(w/2)
    local Vy = Vy or math.floor(h/2)
    table.insert(Graphs,{})
    local n = #Graphs
    for y=1, Ys do
        table.insert(buffer[n],{})
        for x=1, Xs do
            local i = {1,32768," "}
            table.insert(buffer[n][Ys],i)
        end
    end
    return n
end
local function drawCrass(Vx,Vy,Bc,Cc) --vertex
    local Vx = Vx or math.floor(w/2)
    local Vy = Vy or math.floor(h/2)
    local Bc = Bc or colors.white
    local CC = Cc or colors.blue
    buf.clsB(buffer,Bc)
    for y=1,h,2 do
        if 0 < Vx and Vx <= 52 then
            buf.drawPixel(buffer,Vx,y,Cc)
        end
    end
    for x=1,w,2 do
        if 0 < Vy and Vy <= 19 then
            buf.drawPixel(buffer,x,Vy,Cc)
        end
    end
end

local function main()
    drawCrass()
    buf.drawBuffer(buffer)
    term.setTextColor(colors.black)
    while rng do
        local args = { os.pullEvent() }
        if args[1] == "terminate" then
            rng = false
        end
    end
    return true
end
local ok, err = pcall(main)
if not ok then
    term.setBackgroundColor(colors.white)
    term.clear()
    term.setCursorPos(1,1)
    term.setTextColor(colors.black)
    write(err)
    sleep(5)
end