homepos.lua

mon = peripheral.wrap("top")
rednet.open("left")
local home = vector.new(gps.locate())

for x = 1, 5 do
  turtle.forward()
end
for x = 1, 5 do
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
  turtle.up()
end

local pos = vector.new(gps.locate())
local dist = pos - home
mon.write("I am ", tostring(dist), " away from home!!!")