Is it possible to force a lower framerate than 60? about glslcanvas HOT 2 OPEN

// Set framerate
if (canvas.hasAttribute('data-framerate')) {
    this.framerate = parseInt(canvas.getAttribute('data-framerate'));
}

function RenderLoop() {
    if (sandbox.nMouse > 1) {
        sandbox.setMouse(mouse);
    }

    if (sandbox.resize()) {
        sandbox.forceRender = true;
    }

    sandbox.render();
    if (sandbox.framerate) {
        window.setTimeout(() => {
            sandbox.animationFrameRequest = window.requestAnimationFrame(RenderLoop);
        }, Math.floor(1000 / sandbox.framerate));
    }
    else {
        sandbox.animationFrameRequest = window.requestAnimationFrame(RenderLoop);
    }
}