This program is very simple. According to your requirements, water level control is to control the time difference of water inflow. It's very simple if it's preset. You can select i0.0, i0. 1 and i0.2 as the input points of the selection buttons for high, medium and low water levels respectively. Then give them three timers, the time is 25s, 15s, 10s respectively. As for the whole program and simple program of program selection, it is actually the difference between two and three cycles of the whole process. The difficulty of this program may lie in the loop, and other times can be solved by timer. In fact, the cycle is not difficult. You need two cycle judgment points. Because washing needs 200 cycles, the judgment point is here at the stop of1s. When the stop loss of 1s ends, you will enter the next cycle, so you can set a counter to record the stop loss of 1s, and then make the final stop loss after the stop loss of 1s is enough for 200 times. This stop is a judgment point. This is the judgment point of this big cycle, and a counter is also needed here. If you record it once, you will go back to the next cycle. Recording three times is the whole program, and recording twice is a simple program. As for whether the recording ends after three or two times, it depends on whether you choose a simple program or a complete program.