Really old shuffle

I have the old (probably first gen) iPod Shuffle- it looks like a white flash drive with just the on/off, volume, forward and back controls. I can't control the order of songs played but I don't care. It is small and light and great for my exercise walks. Someone gave it to me nearly about 10 years ago and I have no documentation on it. I rarely use it and only for about 1 hour at a time. It finally stopped playing music so I figured it needed to be charged. I plugged it in to my laptop USB port and left it plugged in for a long time. It said the synch with my iTunes was complete and I could disconnect. It has a yellow and a green light that flash. I can't tell if it is charged and it doesn't play music anymore, and I don't know what the lights mean. I really like it because it has my oldies on it and would like to get it to work again. Can anyone help me?

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