I found this simple fix for the pebble watch having distortions in its display. From the watch-face display, Press the “Menu” Button and now you see "Notifications, Settings… ". Now simultaneously press Up and Down button. You can see that the Highlighter toggling up and down. Continue to press the button simultaneously for 3 or 4 mins. Bingo ! Your pebble is all good now.
This worked perfectly for me. Share this with your friend if this worked for you too