Experimenting with CSS display, float, positioning and background properties.
16 elements floated left inside a fixed container, wrapping into a 4 × 4 grid.
Shapes sit side by side using display: inline-block.
The same shapes stacked vertically with display: block.
Shapes placed at specific coordinates inside a relative container.
Overriding external CSS with inline style attributes.
Using background-image to apply textures.