Making texts appear/disappear after having completed a task

Hey. I am very new to this. I'm developing a very simple video game in which the player has to take 3 different kinds objects that are on the table and put them in their relative containers. My problem is related to making game instructions appear and disappear (I do not need to go very far with scripting for what is needed). I would like the first instruction to appear as soon as I press play. Once all the objects are placed in the first container I would like the first instruction to disappear and the second statement to appear. Can someone help me?