// Red-Gold Base Ring
let pulse = fundamentalPulse(t) * 0.5 + 0.5; // 0..1
let gradient = ctx.createRadialGradient(centerX, centerY, maxRadius*0.1, centerX, centerY, maxRadius);
gradient.addColorStop(0, `rgba(255, ${Math.floor(180 + 75*pulse)}, 0, 0.6)`); // glowing red-gold center
gradient.addColorStop(1, `rgba(255, ${Math.floor(100 + 155*pulse)}, 50, 0.1)`);

ctx.fillStyle = gradient;
ctx.beginPath();
ctx.arc(centerX, centerY, maxRadius, 0, Math.PI * 2);
ctx.fill();

// Fading Blue Triangle overlay
ctx.save();
ctx.translate(centerX, centerY);
ctx.rotate(Math.PI/2 * pulse); // soft rotation
ctx.beginPath();
const triSize = maxRadius * 0.9;
ctx.moveTo(0, -triSize);
ctx.lineTo(triSize * Math.sin(Math.PI/3), triSize * Math.cos(Math.PI/3));
ctx.lineTo(-triSize * Math.sin(Math.PI/3), triSize * Math.cos(Math.PI/3));
ctx.closePath();
ctx.strokeStyle = `rgba(0, 150, 255, ${0.3 * (1-pulse)})`;
ctx.lineWidth = 4;
ctx.stroke();
ctx.restore();

t++;
requestAnimationFrame(draw);
}
draw();
</script>
</body>
</html>

Use whole code.