BetterBranchUpgrade

local tArgs = { ... }
if #tArgs ~= 1 then
        print( "Usage: mine <direction>" )
        return
end

endRequested = false

function forward()
   if(turtle.getFuelLevel()) == 0 then
   turtle.select(1)
   turtle.refuel(1)
   end
   while (turtle.detect()) do
      endRequested = true
   end
   turtle.forward()
end

if(tArgs[1] == "right") then
   while (endRequested == false) do
      shell.run("bb", "21")
      turtle.turnRight()
      forward()
      forward()
      forward()
      turtle.turnLeft()
   end
elseif(tArgs[1] == "left") then
   while (endRequested == false) do
      shell.run("bb", "21")
      turtle.turnLeft()
      forward()
      forward()
      forward()
      turtle.turnRight()
   end
end