Okay Sensei
The Sharingan is the trademark doujutsu of the Uchiha. The Sharingan is a doujutsu that allows the user to see the chakra flow inside a person, and can see the colour of chakra, allowing the user to differentiate between different people's chakra. Because of the Sharingan's ability to see the chakra within a chakra network, the user can also tell if someone is under Genjutsu due to the irregular chakra flow. The Sharingan also has incredible clarity of perception, which lets the user recognize many Genjutsu.
1 TomoeUpon the awakening of the Doujutsu, the eye gains one tomoe. This will allow basic motion perception and the ability to see chakra. While the doujutsu is active, the user will gain increased perception of motion that only ninja of a higher level or rank would be able to see. Though the ability to perceive motion increases throughout the stages of the Sharingan. The 1T Sharingan grants the ability to see through D-Rank Genjutsu, and the ability to track Taijutsu equal or superior to that of the user and some of Ninjutsu movement. This will allow the user to make the best reaction based on the situation
2 Tomoe : Upon awakening, the Sharingan will gain a second tomoe at this stage. The 2T Sharingan grants motion perception superior to the previous stage and the ability to copy these movements nearly flawlessly granted the user has the physical capability to replicate these movements. As said before, increased motion perception is an ability granted by the 2T, as well as the ability to copy small moves made by an adversary. The speed of the movements which the 2T Sharingan predict can be twice as fast as those seen by the 1T Sharingan, it also grants the ability to predict the use of some Ninjutsu by reading the hand-seals used. It also grants the ability to break through C-Rank Genjutsu.
3 TomoeUpon being unlocked, the Sharingan gains a third tomoe. This form of the Sharingan grants precognition of movements, the ability to copy movements and the ability to perceive movement. However, these abilities are all superior to those of the previous stages of the Sharingan. The user is then granted the ability of keeping up with incredibly high speeds and can replicate basic taijutsu movement flawlessly. The user can now copy hand-seals performed by the opponent and use the same technique as them, provided that the user has the capability to use that jutsu. The user is now able to see through and break B-Rank Genjutsu. A new ability this stage of the Sharingan grants is the ability to hypnotize an opponent. This can only be done via eye-contact and performed on ninja one rank lower than the user.