-set style line 1 lc rgb '#0060ad' lt 1 lw 2 pt 1 ps 1.5 # --- blue
-set style line 3 lc rgb '#dd181f' lt 1 lw 2 pt 1 ps 1.5 # --- red
+set style line 1 lc rgb '#000c16' lt 1 lw 2 pt 4 ps 1.5 # --- blue
+set style line 2 lc rgb '#000c16' lt 1 lw 2 pt 5 ps 1.5 # --- red
+set style line 3 lc rgb '#000c16' lt 1 lw 2 pt 6 ps 1.5 # --- red
+set style line 4 lc rgb '#000c16' lt 1 lw 2 pt 7 ps 1.5 # --- red