They  communicate first through an exchange of mathematical concepts, like the value of pi, and then through answers to specific questions about Martian life. The transmissions claim that Mars is a utopia, which has led to great technological advancement and the elimination of scarcity, but that there is no fear of nuclear war.
They initially communicate via mathematical ideas, such as pi's value, and subsequently through specific inquiries about Martian life. The signals assert that Mars is a paradise, which has spurred significant technological progress and the eradication of scarcity, but there is no concern over nuclear conflict.