I want to update my dialog every one second. What should I do to update the dialog?

I have two dialog name CDIAGNOSTIC and CPCBASE. In CDIAGNOSTIC, I has one button everytime I click on this button. It will display CPCBASE dialog, CPCBASE dialog have two label. I want to display label 1 from number 1 to 10 and label 2 from number 10 to 1. CPCBASE dialog only update label 1 and 2 every one second and display different number everytime it updates.