Look at the next customer's order. Click the button for the berries that match the color of the juice, and then click the blender until the berries are blended. Then click the correct glass. When the customer leaves behind a bag, click on it to pick it up. Click on a flower to serve it to a customer to give them more patience.
If you run out of berries, click the bird at the top left to order more. If you run out of glasses, click the purple-headed mushrooms to restock.