Experiment with CSS Flexbox properties and see the results in real time.
display: flex; flex-direction: row; justify-content: flex-start; align-items: stretch; flex-wrap: nowrap; gap: 8px;
Use the dropdown menus to change flex-direction, justify-content, align-items, and flex-wrap. Adjust the gap slider and the number of child items. Watch the colored boxes rearrange in the preview area as you change each property. Copy the CSS code when you have the layout you want.