The light curves for the cooler channels do not show strong variation in the loop-top intensities.

Using the traced loop shown in Figure \[fig:hot\_loop\], we created time-distance map using corrected 94 [Å]{} (top right), AIA 131 [Å]{} (bottom left) and 335 [Å]{} (bottom right) channels, and plotted in Figure \[fig:bright\_front\]. These time-distance plots clearly reveal the movement of hot plasma from footpoint regions to loop-top. The white over-plotted lines on time-distance plots are drawn to visualize the plasma movement. The steepness of the white lines in different time-distance plots, suggests that the hot loop is first seen in 131 [Å]{} channel followed by corrected 94 [Å]{} channel, and later in 335 [Å]{} channel. This is exactly observed in the light curves shown in Figure \[fig:lc\_top\]. The whole loop became fully brightened after the ARTBs after $\approx25$ s in 131 [Å]{}, $\approx 40$ s in 94 [Å]{}, and $\approx6.5$ min in 335 [Å]{}. We estimated the speed of plasma motion from foot-points towards the lop top by measuring the slope of these white-lines. We found that the speed was highest in 131 [Å]{} ($\approx 211$ km s$^{-1}$), followed by corrected 94 [Å]{} ($\approx 74$  km s$^{-1}$, and 335 [Å]{} ($\approx 50$ 