function [units,connections] = create_lever_pulling_a_network
units = zeros(4,3);
units(1,:) = [0.3,0.25,1]; 
units(2,:) = [0.7,0.25,1]; 
units(3,:) = [0.3,1.25,2]; 
units(4,:) = [0.7,1.25,2]; 
connections = cell(4,3);
connections{1,3} = [3,1];
connections{2,3} = [4,1];
connections{3,2} = [1,1];
connections{4,2} = [2,1];