I'll help you test this webpage by following the instructions. Let me start by taking a screenshot to see the current state of the page.
Screenshot
I can see a webpage with a "Progress Bar" title and two buttons: "Start Progress" and "Reset". The progress bar appears to be empty (gray). Following the instructions, I'll click on the "Start Progress" button.
Screenshot
Good! I've clicked the "Start Progress" button and can see the progress bar has started. I notice:
1. The progress bar now shows some purple/blue fill on the left side (indicating progress has begun)
2. The "Start Progress" button now shows "Stop Progress" with an X icon
Now I need to wait 10 seconds for the progress bar to reach 100%. I'll wait and then take another screenshot to check the progress.
Screenshot
Perfect! After waiting 10 seconds, I can see that:
1. The progress bar is now completely filled with purple/blue color (100% complete)
2. The button has changed back to "Start Progress" (indicating the progress has completed)
Now I need to verify that the progress bar stays full. I'll wait a bit more and take another screenshot to confirm the progress bar remains at 100%.
Screenshot
Excellent! The progress bar is still showing as completely full after additional waiting time. The test has been completed successfully:
1. ✓ I clicked the "Start Progress" button successfully
2. ✓ I waited 10 seconds and the progress bar reached 100% (completely filled)
3. ✓ I verified that the progress bar stays full even after additional time
The webpage behaved as expected with no visual inconsistencies or unintended behavior.
<answer>PASS</answer>