FORMAT CELL - Patterns tab - Shadow 01, steps:

1. Select the cell(s).
2. FORMAT menu.
3. CELL... item.
4. FORMAT CELL... dialog box appears.
5. PATTERNS tab.
6. CELL SHADING - choose shading color from the palete.
7. CELL SHADING - choose gray percentage/STRIPE.
8. MORE COLOURS.
9. The end (Kraj).