-- This program creates a square of 9 3x3 block satellites for use as GPS trackers.

local v = 1
local y = 0
local x = 0
local s = 0
-- v/x are timers, y is the turtle's Y coordinate. s is the spread of the satellites.

-- Functions, placesat places a 3x3 square starting with the middle, then a console. landing lands the turtle at the end.
function placesat()
turtle.down()
turtle.placeDown()
turtle.forward()
turtle.placeDown()
turtle.turnRight()
turtle.forward()
turtle.placeDown()
turtle.turnRight()
turtle.forward()
turtle.placeDown()
turtle.forward()
turtle.placeDown()
turtle.turnRight()
turtle.forward()
turtle.placeDown()
turtle.forward()
turtle.placeDown()
turtle.turnRight()
turtle.forward()
turtle.placeDown()
turtle.forward()
turtle.placeDown()
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
turtle.back()
turtle.up()
turtle.select(9)
turtle.placeDown()
turtle.select(1)
if turtle.getItemCount(1) == 0 then
turtle.select(2)
else
end
x = 1
end
function landing()
turtle.turnLeft()
turtle.forward()
turtle.forward()
turtle.turnLeft()
turtle.turnLeft()
turtle.down()
turtle.down()
turtle.down()
turtle.forward()
turtle.forward()
turtle.turnLeft()
 repeat
 turtle.down()
 v = v - 1
 until v < 2
end
print ("Enter your turtle's current elevation [Y].")
y = tonumber (read())
print ("Place materials in slots 1-2, computers in slot 9. Enter the desired spread and press enter to begin.")
s = tonumber (read())
print ("Spread of ..s.. selected. Beginning ascent.")
-- This is the beginning ascent.
repeat
turtle.up()
v = v + 1
until v > (129 - y)
-- The extra 1 block of ascent is to account for the 1 block drop at the start of placesat
placesat()
repeat
turtle.forward()
x = x + 1
until x > s
-- Second platform
placesat()
turtle.turnLeft()
repeat
turtle.forward()
x = x + 1
until x > s
turtle.turnRight()
-- Third platform
placesat()
turtle.turnLeft()
turtle.turnLeft()
repeat
turtle.forward()
x = x + 1
until x > s
turtle.turnRight()
turtle.turnRight()
-- Forth platform
placesat()
turtle.turnLeft()
turtle.turnLeft()
repeat
turtle.forward()
x = x + 1
until x > s
turtle.turnRight()
turtle.turnRight()
-- Fifth platform
placesat()
turtle.turnRight()
repeat
turtle.forward()
x = x + 1
until x > s
turtle.turnLeft()
-- Sixth platform
placesat()
turtle.turnRight()
repeat
turtle.forward()
x = x + 1
until x > s
turtle.turnLeft()
-- Seventh platform
placesat()
repeat
turtle.forward()
x = x + 1
until x > s
-- Eighth platform
placesat()
repeat
turtle.forward()
x = x + 1
until x > s
-- Final platform
placesat()
turtle.turnLeft()
repeat
turtle.forward()
x = x + 1
until x > s
x = 0
turtle.turnLeft()
turtle.up()
repeat
turtle.forward()
x = x + 1
until x > s
x = 0
turtle.turnRight()
turtle.turnRight()
landing()