Panel (a) shows a tricolor AIA image with channels in 94 Å (red), 131 Å (green), and 335 Å (blue) at 14:41 UT. The filament, flare loop, circular ribbon (RC), and inner-spine ribbon (RI) are indicated by black arrows. Panels (b)–(c) show distance–time diagrams constructed from slice1 and slice2 in panel a. The changing colors illustrate a heating and cooling process. The borders between dominated AIA passbands are indicated by white dashed lines.