Finger Developer exercises are an extremely effective way to build speed and coordination. I actually still use a version of this one to this day. You can use it as a warm up exercise, or use it to build speed in your playing.
Pay special attention to the pattern. I’ll break it down into sections to highlight this pattern. Start by playing this with a metronome set to a low tempo. Build it by 5bpm (Beats Per Minute) at a time.
(If you don’t have a metronome, go to your smart phone’s app store. There are several free options out there!)