maybe you can use HTML...
Here is an example (15 degrees/step):
Open file with a browser (remove '.txt' extension)
<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
height: 1000px;
width: 1000px;
background-color: red; /* For browsers that do not support gradients */
background-image: conic-gradient(
black 0deg, white 15deg, black 30deg, white 45deg, black 60deg, white 75deg,
black 90deg, white 105deg, black 120deg, white 135deg, black 150deg, white 165deg,
black 180deg, white 195deg, black 210deg, white 225deg, black 240deg, white 255deg,
black 270deg, white 285deg, black 300deg, white 315deg, black 330deg, white 345deg,
black 360deg
);
}
</style>
</head>
<body>
<h1>Conic Gradient - 15 degrees for each color</h1>
<div id="grad1"></div>
</body>
</html>