```
html {
height: 100%;
background: linear-gradient(120deg,
#000 .125em, #0092b7 .125em,
#0092b7 calc(50% - .125em), #000 calc(50% - .125em),
#000 calc(50% + .125em), #0092b7 calc(50% + .125em),
#0092b7 calc(100% - .125em), #000 calc(100% - .125em));
background-size: 1.5em/sqrt(2) 1.5em/sqrt(2);
}
```

### External CSS

This Pen doesn't use any external CSS resources.

### External JavaScript

This Pen doesn't use any external JavaScript resources.