function result = WaterFul()
    persistent waterLevel;
    if isempty(waterLevel)
        waterLevel = 0;
    end
    
    fprintf('Checking water level...\n');
    fprintf('Water Inlet Valve OPEN\n');
    
    pause(2);
    
    waterLevel = 100;
    fprintf('Water level: %d%%\n', waterLevel);
    fprintf('Water Inlet Valve CLOSE\n');
    
    if waterLevel > 80
        result = 1;
    else
        result = 0;
    end
end