Nexus

-- Coded by Wyvern
portals = {"Age 1", "Age 2", "Age 3"}
numberOfButtonsPerLine = 1
monitorSide = "left"
modemSide = "top"
nexusTurtleID = 153

m = peripheral.wrap(monitorSide)
rednet.open(modemSide)
shell.run("pastebin", "get", "vcRXLMhn", "gui") -- My personnal buttons api
os.loadAPI("gui")

print(os.getComputerID()..": Starting to work...")

gui.registerPeripheral(monitorSide)
gui.setBackgroundColor("white")

sWidth, sHeight = m.getSize()
width = math.floor((sWidth-5)/numberOfButtonsPerLine)
btn = {}
for i=0, #portals-1 do
    x = math.floor( (sWidth/numberOfButtonsPerLine) * (i%3) + 2)
    --2,14,26,2,14,26,2,14,26,2,14,26...
    y = math.floor(i/numberOfButtonsPerLine)*6+2 --2,2,2,8,8,8,14,14,14,20,20,20...
    btn[i+1] = gui.guiCreateButton(portals[i+1], x, y, width, 4)
end

function sendTonexusTurtleID(text)
    rednet.send(nexusTurtleID, text)
end

while true do
    nMsg = gui.guiGetMsg()
    for i=1, #btn do
        if nMsg == btn[i] then
            print(i)
            sendTonexusTurtleID(i)
        end
    end
    sleep(0.1)
end