LIGHT_SPEED = 299792.458 

colorList = ['r', 'b', 'g', 'y', 'c', 'm', 
             'brown', 'grey',
             'darkred', 'orange', 'pink', 'darkblue',
             'lightblue', 'chocolate',
             'indigo', 'lightseagreen', 'maroon', 'olive',
             'royalblue', 'palevioletred', 'seagreen', 'tomato',
             'aquamarine', 'darkslateblue',
             'khaki', 'lawngreen', 'mediumorchid',
             'orangered', 'thistle'
             'yellowgreen']

linewidth = 4
fontsize = 12