View difference between Paste ID: zsksAPPq and sawWmevr

 function cPrint(str)
     term.clear()
     term.setCursorPos(1,1)
     print(str)
 end
 
 cPrint('starting up quarry!')
 os.sleep(1)
 cPrint('')
 
 os.loadAPI('nav.lua')
 nav.calibrate()
 
 function goBack(functionCalled)
-    initx, inity, initz = nav.pos.x, nav.pos.y, nav.pos.z
+    initx, inity, initz, initDir = nav.pos.x, nav.pos.y, nav.pos.z, nav.pos.dir
     if nav.pos.z ~= 0 then
         nav.up(math.abs(nav.pos.z))
     end
-    while not nav.pos.dir == 2 do
+    nav.goDir(2)
-        nav.turnRight()
+
         nav.forward(math.abs(nav.pos.y))
     end
     if nav.pos.x ~= 0 then
         if nav.pos.x < 0 then
             nav.goDir(1)
             nav.forward(math.abs(nav.pos.x))
-            while nav.pos.dir ~= 1 do
+
-                nav.turnRight()
+            nav.goDir(3)
-            end
+
         end
     end
-            while nav.pos.dir ~= 3 do
+
-                nav.turnRight()
+    nav.turnRight(2)
-            end
+	nav.forward(inity)
 	if initx/math.abs(initx) = -1 do
 		nav.turnLeft(1)
 	elseif initx/math.abs(initx) = 1 do
 		nav.turnRight(1)
-
+	end
 	if initx ~= 0 then
 		nav.forward(math.abs(initx))
 	end
-    if turtle.getFuelLevel() < 200 then
+	nav.down(initz)
 	nav.goDir(initDir)
 end
 
 function refuel()
     if turtle.getFuelLevel() < 2*(math.abs(nav.pos.z) + math.abs(nav.pos.y) + math.abs(math.pos.x) + 10) then
         if not turtle.refuel() then
             goBack(grabFuel)
         end
     end
-        if checkFuel() == then
+
 
-        if checkInv == then
+function checkInv()
 	if turtle.getItemCount(16) ~= 0 then
-    end
+		goBack(dropOff)
 	end
 end
 
 function grabFuel()
 	turtle.suckUp(64)
 end
 
 function dropOff()
 	for i=2, 16 do
 		turtle.select(i)
 		turtle.drop(64)
 	end
 	turtle.select(1)
 end
 
 function forward(x)
     for i = 1, x do
         nav.forward(1)
         refuel()
         checkInv()
     end
 end