Evolution of [O III] (4959 and 5007 Å lines) on day 224 (top left panel), 252 (top right panel), 336 (bottom left panel), and 1064 (bottom right panel). We note the increase in intensity from day 224 to day 336 and then the drop in intensity on day 1064. Here, one unit of x and y position corresponds to x₂₂₄ = 6.3 × 10¹² cm, x₂₅₂ = 1.41 × 10¹³ cm, x₃₃₆ = 2.09 × 10¹³ cm, and x₁₀₆₄ = 3.31 × 10¹¹ cm.