Clapmaster shuld be very helpful with this.I will also explain it to you: Hold down the left button on your mouse and keep holding it and move your mouse to the left and scroll upwards until you reach the top, when the text is all highlighted in blue, click the right button on your mouse and you should see a menu pop up, look closely for "copy" and click on it. Then leave the text like that in blue, (it should remain like that if you let go of the left button on your mouse.) then move your mouse to the down arrow on the right side of the computer screen until you see the post message button. When you see the white screen for message text make sure your black line is blinking in the text, and make sure you have your arrow on the white screen, click the right button on you mouse again and you should see another small menu pop-up, look closely and you should see "paste." click o that and wa-la, you got the smae message text as the person who had posted before you, last step is this: whoever you choose to hurt and heal click on the chacters numbers to increase and decrease by one number, here's an example: Down below are the points of the characters.
Mr. Krabs - 30 Heal Mr. Krabs -31
Stinky - 30 Hurt Stinky -29
So you backspace one or two times on the numbers to increase it by one and decrease another character by one, and the reason i say one or two times is because it depends on how many points it has, two times if it is still in the double digit numbers and one time if it is in the single digit numbers.
A mouse though is for a regular computer (desktop) so if you are currently using a laptop let me know if you have trouble and i will help you some more.