colorful smoky effect that follows the mouse cursor!

  <style>
        body {
            margin: 0;
            overflow: hidden;
            background-color: #111; /* Dark background for contrast */
        }
        canvas {
            position: absolute;
            top: 0;
            left: 0;
            pointer-events: none;
        }
    </style>

<script>
        const canvas = document.getElementById("smokeCanvas");
        const ctx = canvas.getContext("2d");

        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;

        window.addEventListener("resize", () => {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
        });

        let particles = [];

        function getRandomColor() {
            const colors = ["#ff0000", "#ff7300", "#ffeb00", "#00ff00", "#007bff", "#4b0082", "#ee82ee"];
            return colors[Math.floor(Math.random() * colors.length)];
        }

        class SmokeParticle {
            constructor(x, y) {
                this.x = x;
                this.y = y;
                this.size = Math.random() * 10 + 5;
                this.opacity = 1;
                this.color = getRandomColor();
                this.velocityX = (Math.random() - 0.5) * 2;
                this.velocityY = Math.random() * -1.5 - 1;
            }

            update() {
                this.x += this.velocityX;
                this.y += this.velocityY;
                this.size *= 0.96;  // Shrinks over time
                this.opacity -= 0.02;  // Fades away
            }

            draw() {
                ctx.beginPath();
                ctx.fillStyle = `rgba(${parseInt(this.color.slice(1, 3), 16)}, 
                                      ${parseInt(this.color.slice(3, 5), 16)}, 
                                      ${parseInt(this.color.slice(5, 7), 16)}, 
                                      ${this.opacity})`;
                ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2);
                ctx.fill();
            }
        }

        function animateParticles() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);

            particles.forEach((particle, index) => {
                particle.update();
                particle.draw();

                if (particle.opacity <= 0 || particle.size <= 0.5) {
                    particles.splice(index, 1);
                }
            });

            requestAnimationFrame(animateParticles);
        }

        document.addEventListener("mousemove", (e) => {
            for (let i = 0; i < 3; i++) {
                particles.push(new SmokeParticle(e.clientX, e.clientY));
            }
        });

        animateParticles();
    </script>