I want to create an animation with multiple sprites images on a prefab ?

I have created a prefab "Block" of which there are three types and each of them have their own sprite. So I created the fowling script and added to my prefab object

 public BlockType type;
         public enum BlockType
         {
             RedBox,
             YellowBox,
             BlueBox,
         }
         public Sprite[] sprite;
         public void SetType(BlockType t)
         {
             switch(t)
     
             {
                 case BlockType.BlueBox:
                     this.GetComponent<Image>().sprite = sprite[0];
                     type = BlockType.BlueBox;
                     break;
                 case BlockType.RedBox:
                     this.GetComponent<Image>().sprite = sprite[1];
                     type = BlockType.RedBox;
                     break;
                 case BlockType.YellowBox:
                     this.GetComponent<Image>().sprite = sprite[2];
                     type = BlockType.YellowBox;
                     break;
             }
         }

And then I created another script which randomly selects a Box images and place it on the grid

 for (int i = 0; i <= ySize; i++)
     {
         for(int j=0; j < xSize; j++)
         {
             GameObject block = Instantiate(Prefab);
             grid[i, j] = block;
             block.GetComponent<RectTransform>().anchoredPosition=new Vector2(x, y);
             block.transform.SetParent(canvas.transform);
             int random = Random.Range(0, 2);
             switch (random)
             {
                 case 0:
                     block.GetComponent<BlockControl>().SetType(BlockControl.BlockType.BlueBox);
                     break;
                 case 1:
                     block.GetComponent<BlockControl>().SetType(BlockControl.BlockType.RedBox);
                     break;
                 case 2:
                     block.GetComponent<BlockControl>().SetType(BlockControl.BlockType.YellowBox);
                     break;
             }
             x += xWidth*space;
         }
         y -= yHeight*space;
         x = xStart;
     }
 }

The Problem i am facing is that the prefab shows only one sprite on the grid for each type, but i have a sprite sheet with multiple sprites of the block and i want these to come with animation on my grid using sprite sheet. How should i create an animation which will use sprite sheets to display animation of how blocks appear on the grid.