<!DOCTYPE html>
<html>
<head>
<style>
    div { 
        width: 100px;
        height: 100px;
    }

    #linear {
        background-image: linear-gradient(transparent, rgb(0, 0, 255));
    }

    #linear-repeating {
        background-image: repeating-linear-gradient(transparent, rgb(0, 0, 255) 25px);
    }

    #radial {
        background-image: radial-gradient(transparent, rgb(0, 0, 255));
    }

    #radial-repeating {
        background-image: repeating-radial-gradient(transparent, rgb(0, 0, 255) 25px);
    }

    #conic {
        background-image: conic-gradient(transparent, rgb(0, 0, 255));
    }

    #conic-repeating {
        background-image: repeating-conic-gradient(transparent, rgb(0, 0, 255) 30deg);
    }
    
</style>
</head>
<body>
<div id="linear"></div>
<div id="linear-repeating"></div>
<div id="radial"></div>
<div id="radial-repeating"></div>
<div id="conic"></div>
<div id="conic-repeating"></div>
</body>
</html>