We can either combine the positive of this with the positive of this, or we can combine the positive orbital here and the negative orbital here. Negative simply means we flip the signs. In other words, this green is the positive, this green is the negative. So let's begin by adding or by combining the positive two p and the positive to P. We get the following orientation. Now notice in this orientation we have the positive interacting in a bonding way with the positive and so that forms a bond. And here we have an anti bonding interaction because the negative of this two p orbital interacts with the positive section of this two p orbital.