CSS Animation Tutorial: Teach you step by step how to achieve flickering background effects

CSS Animation Tutorial: Teach you step-by-step to realize the flashing background effect

Introduction:
In web design, animation effects can add vitality and appeal to web pages. CSS animation is a simple yet powerful way to achieve animation effects. This tutorial will teach you step by step how to use CSS animation to achieve a flickering background effect, and provide specific code examples.

1. HTML structure
First, we need to create an HTML structure that contains the elements to which animation is to be applied. In this example, we will create a div element and give it a unique id, as shown below:

<div id="animate"></div>

2. CSS Style
Next, we need to add CSS style to this div element. First, we set its background color to the initial value, and then set its width, height and border style. The code is as follows:

#animate {
  width: 200px;
  height: 200px;
  border: 1px solid #000;
  background-color: #fff;
}

3. CSS animation keyframes
The next step is to define the key to CSS animation frame. Keyframes are key points in animation, and we can set different styles in each keyframe. In this example, we will define different background colors in two keyframes to achieve a flickering effect. The code is as follows:

@keyframes blink {
  0% {
    background-color: #fff;
  }
  50% {
    background-color: #f00;
  }
  100% {
    background-color: #fff;
  }
}

In the above code, we use the @keyframes rule to define the animation named "blink". In the 0% keyframe, we set the background color to white; in the 50% keyframe, we set the background color to red; and in the 100% keyframe, we set the background color to white.

4. Apply CSS animation
Now, we need to apply the defined CSS animation to our elements. We can achieve this using the animation attribute. The specific code is as follows:

#animate {
  width: 200px;
  height: 200px;
  border: 1px solid #000;
  background-color: #fff;
  animation: blink 1s infinite;
}

In the above code, we apply the animation named "blink" to the element with the id "animate" through the animation attribute. We set the duration of the animation to 1 second and the number of repetitions to unlimited.

5. Complete the effect
Through the above steps, we have completed the animation effect of the flashing background. When you view the page in a browser, you'll see the background color of the div element flash from white to red and back to white at regular intervals.

Summary:
In this tutorial, we will teach you step by step how to use CSS animation to achieve a flickering background effect. By setting keyframes and applying animations, we can create gorgeous animation effects that add life to web pages. I hope this tutorial is helpful to you and inspires your creativity in web design.

Complete code example:

  
  
  
  


  <div id="animate"></div>

The above is a CSS animation tutorial to achieve flickering background effects. I hope you can master the basic principles and application methods of CSS animation through this tutorial, and be able to use it flexibly in your own web design.

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