Here's the basic code structure for rendering particles on an HTML Canvas using Javascript:

First, we need to create a new HTML Canvas element in our HTML file, and give it an ID so we can reference it in our Javascript code:
```html
<canvas id="particle-canvas"></canvas>
```
Next, we can write our Javascript code to create the particle objects and render them on the canvas. Here is an example function that creates a single particle:

```js
function createParticle(x, y, size, color) {
  return {
    x: x,
    y: y,
    size: size,
    color: color,
    draw: function(ctx) {
      ctx.fillStyle = this.color;
      ctx.beginPath();
      ctx.arc(this.x, this.y, this.size, 0, Math.PI*2);
      ctx.closePath();
      ctx.fill();
    }
  };
}
```

This function takes four parameters: x and y coordinates for the particle's position, a size (radius) for the particle, and a color for the particle. It returns an object with those properties, as well as a "draw" method that will render the particle on the canvas using the CanvasRenderingContext2D's "arc" function.

To render the particles on the canvas, we can create an array of particle objects and loop through them, calling the "draw" method for each one:

```js
let canvas = document.getElementById("particle-canvas");
let ctx = canvas.getContext("2d");

let particles = [];

for (let i = 0; i < 100; i++) {
  particles.push(createParticle(
    Math.random() * canvas.width,
    Math.random() * canvas.height,
    5,
    "white"
  ));
}

function renderParticles() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  for (let i = 0; i < particles.length; i++) {
    particles[i].draw(ctx);
  }
  requestAnimationFrame(renderParticles);
}

renderParticles();
```
Here, we first get a reference to the canvas element and its CanvasRenderingContext2D object. Then, we create an array of 100 particle objects with random positions, a size of 5, and a white color.

Finally, we create a renderParticles function that will clear the canvas and loop through our particles array, calling the "draw" method for each particle.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence