righteye lefteye clone(righteye is an exact copy of the left righteye move( , strategic use of cloning can make some graphics tasks much easier graphing future value now that you have some idea of how to use objects from the graphics modulewe're ready to try some real graphics programming one of the most important uses of graphics is providing visual representation of data they say picture is worth thousand wordsit is almost certainly better than thousand numbers just about any program that manipulates numeric data can be improved with bit of graphical output remember the program in that computed the future value of ten year investmentlet' try our hand at creating graphical summary programming with graphics requires careful planning you'll probably want pencil and paper handy to draw some diagrams and scratch out calculations as we go along as usualwe begin by considering the specification of exactly what the program will do the original program futval py had two inputsthe amount of money to be invested and the annualized rate of interest using these inputsthe program calculated the change in principal year by year for ten years using the formula principal principal( aprit then printed out the final value of the principal in the graphical versionthe output will be ten-year bar graph where the height of successive bars represents the value of the principal in successive years let' use concrete example for illustration suppose we invest $ at interest this table shows the growth of the investment over ten-year periodyears value $ , $ , $ , $ , $ , $ , $ , $ , $ , $ , $ , our program will display this information in bar graph figure shows the data in graphical form the graph actually contains eleven bars the first bar shows the original value of the principal for referencelet' number these bars according to the number of years of interest accrued - here is rough design for the program