def text_cloud(self,text,max_text_size=72,min_text_size=12,expand_width=50,expand_height=50,max_count=100000):
        '''Creates a word cloud using plain text.'''
        worddict = assign_fonts(tuplecount(text),max_text_size,min_text_size,self.exclude_words)
        sorted_worddict = list(reversed(sorted(worddict.keys(), key=lambda x: worddict[x])))
        for word in sorted_worddict:
            self.render_word(word,worddict[word],(randint(0,255),randint(0,255),randint(0,255)))
            if self.width < self.word_size[0]:
                #If the word is bigger than the surface, expand the surface.
                self.expand(self.word_size[0]-self.width,0)
            elif self.height < self.word_size[1]:
                self.expand(0,self.word_size[1]-self.height)
            position = [randint(0,self.width-self.word_size[0]),randint(0,self.height-self.word_size[1])]
            loopcount = 0
            while self.collides(position,self.word_size):
                if loopcount > max_count:
                #If it can't find a position for the word, expand the cloud.
                    self.expand(expand_width,expand_height)
                    loopcount = 0
                position = [randint(0,self.width-self.word_size[0]),randint(0,self.height-self.word_size[1])]
                loopcount += 1
            self.plot_word(position)
Creates a word cloud using plain text.