Figure 6
Simulation of eyespot signal expansion with a fixed initial velocity v 0 . Two signals (n = 2) with the same initial velocity (v 0 = 10) and signal duration (D = 3) were assumed. The signal interval I was set at 3. The released signals are distributed in a two-dimensional plane based on the t-x curve shown on the right side of each column. Signal durations are indicated by horizontal bars under the t axis. The signal front is indicated by a blue arrow and the signal rear by a blue-green arrow. Only half of an eyespot is drawn. Red focal dots indicate active organising centres releasing the signal, whereas blue dots indicate organising centres pausing during the signal intervals. As time progresses from t = 1 to t = 12, the widths of both black rings and light rings change dynamically. Under these conditions, typical eyespots probably lie within 8 ≤ t ≤ 10