Connect Passive buzzer module to P1 port of OSOYOO PnP board  with   3-pin PnP cable as below;

Step 0: Go to urlhttps://makecode.microbit.org, click New Project  

Step 1. In the Toolbox, click on the Input categor.   Drag an on button pressed block and place it inside the placeholder .

Step 2.Click on the Pins category . Drag a digital write pin   block  and place it in the on button pressed A block . Then choose P1 from the drop-down menu , also set “to” value as 1.

Step 3. In the Toolbox, click on the Input category again. Drag another on button pressed block  and then place it inside the placeholder .Then choose B from the dropdown menu.

Step 4. Click on the Pins category again. Drag a digital write pin   block  and place it in the on button pressed B block . Then choose P1 from the drop-down menu , also set “to” value as 0.

Step 5. Download this “.hex” file and save it to your MICROBIT disk Driver as following figure.

Below are the full Graphic programming code blocks  we have done for you as reference: