Having safe sex just got a little bit easier — and a lot more colorful.

A group of pretty badass 13- and 14-year-olds just developed the “S.T.Eye,” a condom that changes colors if it detects a sexually transmitted infection. Even better, the condom is color-coded so that it changes different colors based on the infection it detects—green for chlamydia, yellow for herpes, blue for syphilis, and so on.

The students designed the condoms for London’s TeenTech Awards, which asked kids between the ages of 11 and 16 to create “technology to make life better, simpler or easier.” The S.T.Eye inventors definitely accomplished that, and they now have €1000 to prove it.

Though the condom is only in the conceptual stage at this point, we hope the students will follow through with their revolutionary design and bring the S.T.Eye to fruition.