u/Abdullah_SSheikh

I am learning game development and now i'm making a game and creating assets for it but I just can't get how to make this train because I don't know what these circled things are. Can somebody help me: [Train](https://drive.google.com/file/d/16DJRdh2fDLK2cIgOL4S3yOek-xwrEHSV/view?usp=sharing)