How can i make my semen white again instead of blood red semen during masturbation?

Hemospermia: You have hemospermia which is caused by inflammation in prostate and seminal vesicals. Generally antibiotics will help but the problem can be recurrent. I recommend also you see a urologist

Not normal: Not normal to have red semen...Please see a doctor to get treated.

Bloody semen: Droopy, The semen discoloration is unlikely to be of any significance especially when you are young. However, I would suggest you see your urologist about testing for an infection.