loadedFonts={}
def drawtext(screen,text,fontname,col,pos,size,aa=True, bg=None):
    global loadedFonts
    if (fontname,size) in loadedFonts:
        font=loadedFonts[(fontname,size)]
    else:
        font=pygame.font.SysFont(fontname,size)
        loadedFonts[(fontname,size)]=font
    img=font.render(text,aa,col,bg)
    screen.blit(img,pos)