miner.lua

hilbert = "a"
for i=1,7,1 do
new_seq = " "
for j=0,string.len(hilbert),1 do
 char = string.sub(hilbert, j, j)
 if char == "a" then
   new_seq = new_seq.."-bF+aFa+Fb-"
 elseif char == "b" then
   new_seq = new_seq.."+aF-bFb-Fa+"
 else
   print(char)
   new_seq = new_seq..char
 end
end
hilbert = new_seq
end
print(hilbert)

int place = 0;
while(place < string.len(hilbert)) do
 if turtle.getFuelLevel() <= place then
  slot = findFuel()
  if slot == nil then
   returnHome(place)
   break
  else
   turtle.select(slot)
   turtle.refuel()
  end
 else
 instr = string.sub(hilbert,place,place)
 if instr == "F" then
   turtle.dig()
   turtle.forward()
   turtle.digDown()
 elseif instr == "+" then
   turtle.turnRight()
 elseif instr == "-" then
   turtle.turnLeft()
 end

 place = place+1

 if invFull() then
 returnHome(place)
 emptyInv()
 place=0
 end
end

function returnHome(plc)
turtle.turnLeft()
turtle.turnLeft()
while plc > 0 do
 findFuel()
 chr = string.sub(hilbert,plc,plc)
 if chr = "F" then
  turtle.forward()
 elseif chr = "+" then
  turtle.turnRight()
 elseif chr = "-" then
  turtle.turnLeft()
 end
 plc = plc-1
end

function findFuel()
 for slot=0,16,1 do
  turtle.select(slot)
  if turtle.refuel() then
  return slot
  end
 end
return nil
end

function emptyInv()
 findFuel()
 for i=0,16,1 do
  turtle.select(i)
  turtle.dropDown(64)
 end
end