onvert to seconds
    const deltaTime = now - then;
    then = now;

    const canvasTexture = context.getCurrentTexture();
    setupPostProcess(canvasTexture);

    const encoder = device.createCommandEncoder();
    const pass = encoder.beginRenderPass(renderPassDescriptor);
    pass.setPipeline(pipeline);
    pass.setVertexBuffer(0, vertexBuffer);
    pass.setVertexBuffer(1, staticVertexBuffer);
    pass.setVertexBuffer(2, changingVertexBuffer);

    // Set the uniform values in our JavaScript side Float3