I'm trying to connect my atmega328P to the following H bridge, but I'm using 5V source and 2N3904 & 2n3906 transistors instead of 12V as shown in the picture:

[![enter image description here](https://i.stack.imgur.com/uB70E.png)](https://i.stack.imgur.com/uB70E.png)

The problem is that two of the transistors are PNP, but I always used NPN's as a switch by connecting micro-controller's output pin to the NPN's base, but I don't understand how can I 'output' a negative signal to trigger the PNP's from the micro-controller. Any suggestions?