To create an animation in Unity, you can follow these steps :

Prepare your assets : Create or import the models, textures, and other assets you will need for your animation.

Create an animation clip : In the Unity editor, select the object you want to animate in the Hierarchy view, then click on the "Create" menu and select "Animation Clip". This will create a new animation clip asset in your project.

Open the Animation window : In the Unity editor, go to the "Window" menu and select "Animation". This will open the Animation window, which you can use to create and edit animations.

Record keyframes : To create an animation, you need to record keyframes for each property you want to animate. Select the object you want to animate in the Hierarchy view, then use the Animation window to set the starting and ending values for each property you want to animate. You can also use the timeline to adjust the timing of the animation.

Preview the animation : You can preview your animation by clicking on the "Play" button in the Animation window. This will play the animation in the Scene view or Game view, depending on which one is currently active.

Save the animation : Once you have created your animation, you can save it by clicking on the "Save" button in the Animation window. This will save the animation clip asset to your project, which you can then use in your game or application.