Master7 Test

-- Number of neighbouring turtles
numberNeighbours = 2

-- Open up modem to receive wireless broadcasts
rednet.open("right")

-- Wait until neighbouring turtles are ready
function waitForNeighbours(localRowsProgressed)
  local remoteTurtleID, remoteRowsProgressed

  -- Wait for all neighbours to have done same number of rows as master
  for i=1, numberNeighbours do
    repeat
      -- Find how many rows the current remote turtle has done
      remoteTurtleID, remoteRowsProgressed, _ = rednet.receive()
      remoteRowsProgressed = string.match( remoteRowsProgressed, "ROW<%d+>" )
      remoteRowsProgressed = string.match( remoteRowsProgressed, "%d+" )
      remoteRowsProgressed = tonumber( remoteRowsProgressed )

      -- If this is a valid rednet message, and remote turtle is lagging behind, tell him to continue
      if (remoteRowsProgressed ~= nil) and (remoteRowsProgressed < localRowsProgressed) then
        rednet.send(remoteTurtleID, "You are authorised to proceed")
      end

    until localRowsProgressed == remoteRowsProgressed
  end

  rednet.broadcast("You are authorised to proceed")
end

-- Sync number of rows already completed to the harddrive
function updateHarddrive(rowsProgressed)
  rowsFile = fs.open("rowsProgressed", "w")
  rowsFile.writeLine( tostring( rowsProgressed ) )
  rowsFile.close()
end

-- Read number of rows already completed from harddrive on startup
rowsFile = fs.open("rowsProgressed", "r")

if rowsFile ~= nil then
  rowsProgressed = tonumber( rowsFile.readLine() )
  rowsFile.close()
else
  rowsProgressed = 0
end

bool=true

while bool==true do
  if rs.getInput("back", true) then
      print ("Waiting")
      sleep (1)
  else
    print ("Let's Roll!")
    bool=false
  end
end

X=3

print ("Startup Functions Activating")
print ("Going to lowest point")

turtle.select(3)
turtle.back()

for a = 1, X do
  turtle.digDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.attackDown()
  turtle.down()
end

for b = 1, X do
  turtle.digUp()
    while not turtle.up() do
      turtle.attackUp()
    end
  end

  print ("Calibrated level for a flat bedrock world.")
  print ("---------------------------")
  print ("Starting World Eating Scripts!")
  print ("---------------------------")

  turtle.dig()

  while not turtle.forward() do
    turtle.attack()
  end

  while true do

    for i = 1, 2 do

      for c = 1, X do
        turtle.dig()
        turtle.digDown()
        while not turtle.down() do
          turtle.attackDown()
        end
      end

      for d = 1, X do
        turtle.dig()
        turtle.digUp()
        while not turtle.up() do
          turtle.attackUp()
        end
      end

      for r = 1, 2 do
        turtle.dig()
        while not turtle.forward() do
          turtle.attack()
        end

      end

      Fuel = turtle.getFuelLevel()

      print ("Fuel level is: "..Fuel)

      if Fuel >= 8192 then

        print ("Fuel level is above minimum safe limit.")
        print ("Refueling anyway")

        turtle.select(1)

        for slot = 3, 16 do
          result = turtle.compareTo(slot)
          if result == true then
            turtle.select(slot)
            turtle.refuel()
            turtle.select(1)
            print ("Refueled on slot "..slot)
          else
          end
        end

      else

        print ("Fuel is below safe limit! Not collecting enough coal!")

        turtle.select(1)

        for slot = 3, 16 do
          result = turtle.compareTo(slot)
          if result == true then
            turtle.select(slot)
            turtle.refuel()
            turtle.select(1)
            print ("Refueled on slot "..slot)
          else
        end
      end
    end

    turtle.select(2)
    print ("Dropping off items")

    turtle.dig()

    while not turtle.place() do
      turtle.attack()
    end

    for dropslot = 3, 16 do
      turtle.select(dropslot)
      turtle.drop()
    end

    rowsProgressed = rowsProgressed + 1
    updateHarddrive(rowsProgressed)

    waitForNeighbours(rowsProgressed)

    turtle.select(2)

    turtle.dig()

    turtle.select(3)

  end
end