Pumpkin/Melon Farmer

print("Loading Robust Turtle API...")
local load = os.loadAPI("t")
if load then
  print("Robust Turtle API loaded.")
else
 print("Robust Turtle API not found in the root directory with filename t")
 print("Attempting to download as t from pastebin...")
 os.sleep(2)
 local response = http.get("http://pastebin.com/raw.php?i= e0UksEtT")
 if response then
    print("Great Success.")
    local data = response.readAll()
    response.close()
    local file = fs.open("t", "w")
    file.write(data)
    file.close()
    print("Downloaded as t")
    load = os.loadAPI("t")
    if load then
     print("Robust Turtle API installed & loaded.")
    end
 else
    print( "Download failed. Please install manually from http://pastebin.com/u/MrTurtle." )
    return
 end
end
--farms pumpkins/melons in alternating rows
print("Place "..os.getComputerLabel().." above the block of wood.")
read()
local rows = 4
local rowL = 8
local wait = 60
t.forward()
t.up()
while true do
  local side = "right"
  for i=1, rows do
    t.forward()
    for i=1,rowL do
      t.digDown()
      t.forward()
      --t.suckDown()
    end
    if side=="left" and i~=rows then
      t.goLeft(2)
      t.left()
      side="right"
    elseif side=="right" and i~=rows then
      t.goRight(2)
      t.right()
      side="left"
    elseif side=="left" and i==rows then
      t.goRight(2*(rows-1))
      t.right()
    elseif side=="right" and i==rows then
      t.strafeLeft(2*(rows-1))
      t.back(rowL+1)
    end
  end
  for i=wait, 0, -1 do
    term.clear()
    term.setCursorPos(1,1)
    print("Waiting "..i.." seconds to allow for growth.")
    sleep(1)
  end
end