Plot background line and arrow together

Co-authored-by: Dongdong Tian <seisman.info@gmail.com>

Author: yvonnefroehlich

pygmt/src/pygmtlogo.py

@@ -198,15 +198,16 @@ def _vline_coords(gap=0):
     fig.plot(x=0, y=0, pen=f"{thick_shape}c,{blue}", **args_shape)
     # fig.show()
 
+    # Background vertical line and arrow head
+    fig.plot(data=_vline_coords(gap=thick_comp), fill=color_bg, perspective=True)
     fig.plot(data=_bg_arrow_coords(), fill=color_bg, perspective=True)
 
     # Letters G, M, and T
     fig.plot(data=_letter_g_coords(), fill=red, perspective=True)
     fig.plot(data=_letter_m_coords(), fill=red, perspective=True)
     fig.plot(data=_letter_t_coords(), fill=red, perspective=True)
 
-    # Upper vertical lines
-    fig.plot(data=_vline_coords(gap=thick_comp), fill=color_bg, perspective=True)
+    # Upper vertical line
     fig.plot(data=_vline_coords(), fill=red, perspective=True)
 
     # Outline around the shape for black and white color with dark theme