Mikhail, thank you for your question and answer! Again, I just would like to add some details. Pay your attention (those who learn Russian :) or only are going to do that) to the following verbs: "Посмотрите" and "посмотри". They are two different forms of the same verb. Why do we use different forms? "Посмотрите" is used when you say "Вы" addressing your colleagues. "Посмотри" - if you use "ты". What is the difference between "Вы" and "ты"? "Вы" is a polite "you". It is similar to "Sie" in German and "vous" in French. "Ты" is "you" for friends and people of your age and younger ones. It is like "du" in German and "tu" in French.