What happens after anger disappears? I practiced meditation few years ago,had reached a state where experience consepte of "I"was an illusion.when was Illusion  of the I disappeared anger disappeared altogether. But  I can't  meditate now.It is totally  different. Now wondering thoughts are less.what shall I do ?
If you can give more details on the type of meditation and your current situation -- like anger, and whether 'I' is still there or not -- helpers here might reach you. 

Assuming that you are doing sensation-Vipassana, anger and 'I' have a comeback. As you mentioned, "less wondering thoughts" means that now you are able to see thoughts too. 

It's a progress in meditation -- things coming and passing by, and you are aware of them. Your main focus must be to alter the defiled behaviour pattern by accepting the sensations and  thoughts as they are, and maintaining noble silence in front of them (this part of maintaining noble••• comes under practice of Citta-Vipassana). 

What comes after anger?

Anger generates heat in body. Heat is due to sankharas. After anger seems to pass-by, leftover sankharas induce (or to be precise, divert mind to) other defiled characteristics like lust, memory-loss, frustration etc. These defilements, if  remain unseen wisely, enables anger to have a comeback.