Here is the requested draft that might be useful to you. Disciplinary actions are guidelines stipulated in the company's policy according to government rules, so you have to adhere to those rules.
Name of Employee
SUBJECT: Warning Memo
On [DATE], at [TIME] we met to discuss the problem of your unacceptable habit of taking frequent breaks during working hours. Please note that your act influences other team members negatively and thus bringing down the discipline level in our organization.
All you need to do to improve your habit you need to observe break during specified break-timings.
I will assist you in any way that I can to remedy the problem, however, unless the matter can be corrected, I shall have no other alternative but to further disciplinary or corrective actions. Please treat this warning seriously and improve accordingly.
10th June 2008 From India, Rajkot