arduino uno help

I am new to arduino programming and am looking for help on a program.

I am using an arduino uno with an lcd screen and a liquid crystal library.

The use is to display the delay time between the opening and closing the 2 switches.

Switch 1 will provide a signal to the arduino until opened.

Switch 2 will provide a signal to the arduino until opened.

The program needs to display a time difference between these 2 switches opening down to .001 and if possible .0001 on the lcd and reset the program once switch 1 is closed to restart the test.

Thank you for your help.