Grid Lines

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="512"
    height="512"
    viewBox="0 0 24 24"
>
    <linearGradient
        id="a"
        x1="16.625"
        x2="7.375"
        y1="16.625"
        y2="7.375"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#eb595a" />
        <stop offset="1" stop-color="#f18875" />
    </linearGradient>
    <linearGradient
        id="b"
        x1="20.46"
        x2="3.54"
        y1="20.46"
        y2="3.54"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#629ad3" />
        <stop offset="1" stop-color="#79aed4" />
    </linearGradient>
    <g>
        <path
            fill="#fff"
            d="M7.81 23.5C3.37 23.5.5 20.63.5 16.19V7.81C.5 3.37 3.37.5 7.81.5h8.38c4.44 0 7.31 2.87 7.31 7.31v8.38c0 4.44-2.87 7.31-7.31 7.31z"
        />
        <path
            fill="url(#a)"
            d="M2 12.75h9.25V22H7.81C4.17 22 2 19.83 2 16.19zM16.19 2h-3.44v9.25H22V7.81C22 4.17 19.83 2 16.19 2z"
        />
        <path
            fill="url(#b)"
            d="M2 7.81v3.44h9.25V2H7.81C4.17 2 2 4.17 2 7.81zM12.75 22h3.44c3.64 0 5.81-2.17 5.81-5.81v-3.44h-9.25z"
        />
    </g>
</svg>