потом

In a sentence

• На почетку смо разговарали, а потом почели радити.

  At first, we talked, and then we started working.

  Here, 'потом' is used as a time adverb, indicating a subsequent action.

• Прво прочитај упутство, а потом почни вежбу.

  First, read the instructions, and then start the exercise.

  Here, 'потом' is used to indicate the sequence of actions to be followed.

• Био је трудољубиви ученик, а потом успешни професор.

  He was a diligent student, and afterwards, a successful professor.

  In this sentence, 'потом' describes subsequent development or progression over time.