Red nodes are infected, green nodes are healthy. Additional shortcut links are shown in blue. Most nodes have 4 direct neighbours, while a few of them possess an additional directed random connection to a distant node (2nd part of the video). The spontaneous infection rate is s=0.001 per time step, the infection rate by an infected neighbouring node is p=0.1. Recovery occurs with a rate q=0.4, if there is enough budget b>0 to bear the healing costs c of 80. The budget needed for recovery is created by the number of healthy nodes h(t) and develops by b(t+1)=b(t)+h(t)-cr(t).