# Step 4: make the yellow cross

The bottom two layers are done. Keep yellow on top. In this step we only care about the four **edges** on top having yellow facing **up**. They don't have to match the sides yet, and the corners don't matter.

## Find your shape

Look only at the middle sticker of each edge on the top face, ignoring the corners. You'll see one of four shapes:

- a **dot**: just the centre is yellow
- an **L**: two neighbouring edges are yellow
- a **line**: two opposite edges are yellow
- a **cross**: already done; go to the next step

There is no case with one or three edges up. If you see that, a piece was put in wrong. See [Flipped edge](https://scanmycube.com/help/flipped-edge).

## One algorithm for every shape

```
F R U R' U' F'
```

Front clockwise, then the move from the first layer (`R U R' U'`), then front back anticlockwise.

### Line: hold it left to right

> 3D demo, Line (left–right) → cross: `F R U R' U' F'`

### L: hold it at the back-left

The two yellow edges point back and left, like the hands of a clock at nine o'clock. The algorithm turns the L into a line. Then do it once more.

> 3D demo, L at back-left → line: `F R U R' U' F'`

### Dot: do it, then follow the L

1. Do the algorithm once. You get an L at the front-right.
2. Turn the top twice (`U2`) so the L is at the back-left.
3. Carry on as for the L.

> 3D demo, Dot → L, turn it to the back-left, → line → cross: `F R U R' U' F' U2 F R U R' U' F' F R U R' U' F'`

## Common mistakes

- **Holding the L wrong.** It must point to the back and left. Any other way round and the algorithm gives you a dot or another L.
- **Holding the line front to back.** It must run left to right.
- **Worrying about the corners.** Their yellow stickers can face anywhere for now.

Source: https://scanmycube.com/learn/beginner/yellow-cross