(1.16.5 MCP) animate an item (multiple animations) when something happens

i know is weird, for example i made a 3d model of a gun, if i right click the gun rotates up a bit, if i shift the gun moves down a bit, that kind of animations but i dont want 3 guns each of them with a different animation

in unity i made this revolver's

public GameObject revolver;

IEnumerator animation()
    {
        revolver.transform.Rotate(new Vector3(0,3,0));
        yield return new WaitForSeconds(0.01f);
        revolver.transform.Rotate(new Vector3(0,6,0));
        yield return new WaitForSeconds(0.01f);
        revolver.transform.Rotate(new Vector3(0,9,0));
        yield return new WaitForSeconds(0.01f);
        revolver.transform.Rotate(new Vector3(0,12,0));
        yield return new WaitForSeconds(0.01f);
        revolver.transform.Rotate(new Vector3(0,-3,0));
        yield return new WaitForSeconds(0.01f);
        revolver.transform.Rotate(new Vector3(0,-6,0));
        yield return new WaitForSeconds(0.01f);
        revolver.transform.Rotate(new Vector3(0,-9,0));
        yield return new WaitForSeconds(0.01f);
        revolver.transform.Rotate(new Vector3(0,-12,0));
    }

void AnimateRevolver()
    {
        StartCoroutine(animation());
    }

when i want i call "AnimateRevolver" (again in unity), so i want to make something similar in java minecraft