# How can i move a game object up and down so it acts like a obstacle for my sphere player

the object is a cube which has to go up and come down acting like a obstacle which requires timing to complete

``````   float speed = 1f;
float delta = 3f;  //delta is the difference between min y to max y.

void Update() {
float y = transform.position.y + Mathf.PingPong(speed * Time.time, delta);
Vector3 pos = new Vector3(transform.position.x, y, transform.position.z);
transform.position = pos;
}
``````

Use the MoveTowards function

``````transform.position = Vector3.MoveTowards(firstPosition, endPosition, speed);
``````

Hey

you can use a Co-Routine and use Vector3.Lerp

``````IEnumerator move(Transform _transform)
{
startPos = _transform.position;
t = 0;

endPos = new Vector3(startPos.x + System.Math.Sign(input.x) *  startPos.y = System.Math.Sign(input.y), startPos.z);

factor = 1f;

while (t < 1f)
{
t += Time.deltaTime * moveSpeed * factor;
_transform.position = Vector3.Lerp(startPos, endPos, t);

yield return null;
}

yield return 0;
}
``````

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