How do I change the sounds (in order) with each click on the same object?

Hi, I have been looking for a long time but I have not found an answer. I have an object that should function like the button that runs a playlist, so I would like the sound to change with each click on this object as if it went on with the next song in chronological order. I just can't do it! Help! Thanks....

Add all your sounds to the project with names like Sound1, Sound2, Sound3, .... Sound10

Create a global variable SoundNumber.

On Sprite Clicked 
	If SoundNumber=10 : Set SoundNumber to 1
	Else 	: Add 1 to SoundNumber

	: Audio stop tag "mysound"
	: Audio play "Sound"&SoundNumber with tag "mysound" 

Sorry, I'm a neophyte and I don't understand things written so. I would need all the steps or a screenshot directly on construct. 1) Load the sounds ok, I understand, 2) go on click mouse ok I understand

then I don't understand ..

3) where "if" is written because if it is a command that is not there but I seem to understand that I have to go to the system: compare variable equal to ten: then set sound number to 1 ...it's correct?

4) else did not understand what it means? I don't find command else, where can I find it?

5): Audio stop tag "mysound", : Audio play "Sound" & SoundNumber with tag "mysound". I really don't understand these, where should I go first? what comes before :Audio ? System? Audio? Moreover how do I tie sound1 sound2 sound3 to Soundnumber or to the tag sound?

thank you so much for your availability and patience :)