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CSS

width: 200px;
height: 200px;
background:
  linear-gradient(90deg, rgb(25 181 224 / 1) 2%, rgb(25 181 224 / 0) 2%, rgb(255 255 255 / 0) 98%, rgb(24 181 224 / 1) 98%) 0px 0px / 25px 25px repeat repeat, /* Horizontal Lines */
  linear-gradient(0deg, rgb(25 181 224 / 1) 2%, rgb(255 255 255 / 1) 2%, rgb(255 255 255 / 1) 98%, rgb(25 181 224 / 1) 98%) 0px 0px / 25px 25px repeat repeat; /* Vertical Lines */