You can order very short pieces of DNA from a number of companies, and they will start from these four bottles of chemicals that make up DNA, G, A, T and C, and they will build those very short pieces of DNA for you.
Existen compañías onde se pode encargar  segmentos moi curtos de ADN, elaborados a partir de  catro ingredientes básicos: G, A, T e C. Fabrican os segmentos de ADN a pedido.