Terminal Run Code for n seconds

I've searched for this, but haven't found a single command yet - how would i开发者_如何转开发 run say hello.o for n amount of seconds on the terminal.?

 watch -n 60 hello.o

If you want to run hello.o for n number of seconds for X number of times

x=0
n=60
while [ "$x" -lt 10 ]; do ./hello.o; ((x++));sleep $n; done