  Regulation of multiple reaction modules is quite common in molecular
computation and deep learning networks construction through chemical reactions,
as is always a headache for that sequential execution of modules goes against
the intrinsically parallel nature of chemical reactions. Precisely switching
multiple reaction modules both on and off acts as the core role in programming
chemical reaction systems. Unlike setting up physical compartments or adding
human intervention signals, we adopt the idea of chemical oscillators based on
relaxation oscillation, and assign corresponding clock signal components into
the modules that need to be regulated. This paper mainly demonstrates the
design process of oscillators under the regulation task of three modules, and
provides a suitable approach for automatic termination of the modules cycle. We
provide the simulation results at the level of ordinary differential equation
and ensure that equations can be translated into corresponding chemical
reaction networks.
