1. Determine the slope: The first step in setting levels for your patio is to determine the slope of the ground. This will help you determine how much you need to adjust the levels to create a flat surface. Use a level or a string line to measure the slope.

2. Mark the levels: Once you have determined the slope, mark the levels for your patio. This can be done using stakes and string lines, or by marking the ground with spray paint. Make sure the levels are clearly marked and easy to see.

3. Excavate the area: Next, excavate the area where your patio will be located. This involves removing any grass, weeds, or debris, and digging down to the desired depth. Use a shovel or a mini excavator to do this.

4. Add a base layer: Once the area is excavated, add a base layer of gravel or crushed stone. This will help to create a stable base for your patio and prevent it from shifting or settling over time. Use a compactor to compact the base layer and ensure it is level.

5. Lay the patio: Once the base layer is in place, you can start laying your patio. Start at one corner and work your way out, using the marked levels as a guide. Use a level to ensure that each piece is even and flat.

6. Adjust the levels: As you lay each piece of the patio, you may need to adjust the levels to ensure that it is even with the surrounding pieces. This can be done using a rubber mallet or a block of wood to tap the piece into place.

7. Fill the gaps: Once your patio is laid, you may need to fill in the gaps between the pieces. This can be done with sand or gravel, which will help to stabilize the patio and prevent weeds from growing.

Remember, setting levels for your patio is an important step in creating a stable and functional outdoor space. Take your time and make sure the levels are accurate and easy to follow. With the right techniques and materials, you can create a beautiful and long-lasting patio that you'll enjoy for years to come