<div id="diagram"></div>
<script>
$("#diagram").kendoDiagram({
    shapes: [{
        id: "1",
        x: 100,
        y: 100,
        content: { text: "Shape 1" },
        fill: {
            gradient: {
                type: "linear",
                stops: [
                    { offset: 0, color: "red", opacity: 1 },
                    { offset: 1, color: "blue", opacity: 0.3 }
                ]
            }
        }
    }]
});
</script>