body {
  width: 100vw;
  height: 100vh;
  /**
 * Diagonal stripes - repeating-linear-gradient() method
 */

background: repeating-linear-gradient(60deg, 
              #fb3, #fb3 15px,
              #58a 0, #58a 30px);

}
View Compiled

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.