The first four Saturn I flights, SA-1 through SA-4, featured alternating black and white stripes on the first stage, a checkered pattern on the interstage, and an all-white second stage. The problem with this scheme soon arose. The fuel tanks under the black areas registered heat spikes as the paint absorbed the heat of the Sun. But these black stripes did change from launch to launch. Rather, the upper stages changes. SA-5 launched with a black nose cone while SA-6 and SA-7 both featured a black forward interstage. Later launched saw the upper portion of the rocket painted entirely white.