if i wanted to write a lua script for a minecraft turtle how would i make it mine a 3x3 tunnel?
Here's a basic script for a Minecraft turtle to mine a 3x3 tunnel:

```
-- This script will make the turtle mine a 3x3 tunnel

-- First, the turtle will dig forward until it hits a block
while turtle.detect() do
  turtle.dig()
  turtle.forward()
end

-- Next, the turtle will turn right and dig forward 3 blocks
turtle.turnRight()
for i = 1, 3 do
  turtle.dig()
  turtle.forward()
end

-- The turtle will then turn around and dig forward 3 blocks
turtle.turnAround()
for i = 1, 3 do
  turtle.dig()
  turtle.forward()
end

-- The turtle will turn left and dig forward 3 blocks
turtle.turnLeft()
for i = 1, 3 do
  turtle.dig()
  turtle.forward()
end

-- Finally, the turtle will turn around and dig forward until it hits a block
turtle.turnAround()
while turtle.detect() do
  turtle.dig()
  turtle.forward()
end
```

This script will make the turtle mine a 3x3 tunnel. You can modify the size of the tunnel by changing the number of blocks the turtle digs forward in each direction.