It has been raining the past couple of days,  yet occasionally there is still some sun.   When I  work outdoors,  often I see dark clouds floating towards us from far away.   Sometimes the dark clouds mix with white clouds.   Pictures taken of them look very nice.   It reminds me of the many pictures taken of thunder,  lightning and rainstorms, which are all very imposing.   Of course a sunny day is the best,  yet bad weather has its unique beauty.