How does changing the position of a light source such as a flashlight affect the size of an object's shadow

If u were holding the flashlight above the object the shadow would be a circle on the ground if u were holding the flashlight in front of the object it would make a long slim shadow f the object

Ex: if I was standing near a wall and u held a flashlight in my face, not only I will be blinded by the bright light but it make a shadow of my head on the wall. different angles make different shadows