Rubber Tree Tapper

function tapTree()
  for i=1,4 do
    if ( i%2 == 1 ) then
      while ( turtle.detect() ) do
        turtle.dig()
        turtle.up()
      end
    else
      while ( not turtle.detectDown() ) do
        turtle.down()
        turtle.dig()
      end
    end
    if ( i ~= 4 ) then
      changeSides()
    end
  end
end

function changeSides()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
end

function changeTrees()
  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
end

function changeRows(rowNumber)
  turtle.turnRight()
  turtle.forward()
  if ( rowNumber % 2 == 0 ) then
    turtle.turnLeft()
    for i=1,3 do
      turtle.forward()
    end
    turtle.turnLeft()
  else
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
  end
end

function emptyInventory()
  for i = 1,16 do
    turtle.select(i)
    turtle.drop()
  end
  turtle.select(1)
end

function returnHome(treeCount, rowCount)
  if ( rowCount % 2 == 1 ) then
    turtle.turnLeft()
    for i=1,(treeCount*2) do
      turtle.forward()
    end
    turtle.turnRight()
    for i=1,(rowCount*2-1) do
      turtle.forward()
    end
    turtle.turnLeft()
  else
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    for i=1,((rowCount*2)-3) do
      turtle.forward()
    end
    turtle.turnLeft()
    turtle.forward()
  end
  emptyInventory()
  turtle.turnRight()
  turtle.turnRight()
end

args={ ... }
treeCount=tonumber(args[1])
rowCount=tonumber(args[2])
while true do
  print("Starting Resin Collection")
  print(string.format("There are %d Trees in %d Rows", treeCount, rowCount))
  turtle.forward()
  for i=1,rowCount do
    for j=1,treeCount do
      print(string.format("Starting Tree %d in Row %d", j, i))
      tapTree()
      if ( j ~= treeCount ) then
        changeTrees()
      end
    end
    print(string.format("Completed Row %d", i))
    if ( i ~= rowCount ) then
      changeRows(i)
    end
  end
  print("Completed Tree Tapping, Returning Home")
  returnHome(treeCount, rowCount)
  emptyInventory()
  print("Cycle Complete, sleeping for 5 minutes")
  sleep(300)
end