| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style> | |
| @keyframes play { | |
| from { | |
| background-size: 5% 100%; | |
| } | |
| to { | |
| background-size: 50% 100%; | |
| } | |
| } | |
| button { | |
| width: 200px; | |
| height: 200px; | |
| box-sizing: border-box; | |
| border: 1px solid black; | |
| background-image: linear-gradient(blue, blue), linear-gradient(blue, blue); | |
| background-position: top left, top right; | |
| background-size: 45% 100%; | |
| background-repeat: no-repeat; | |
| animation: play 1000000s -10000s linear; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <p>Should see symmetrical strips of color down both sides.</p> | |
| <button></button> | |
| </body> | |
| </html> | |