Exercise 8: Counting Boxes

 

<!DOCTYPE html>


<html>


<head> Big Head Count 


</head>


<body>




<h1>Time to Count The Shapes</h1>


<p> Count the Red squares on the screen </p>




<fieldset>


    <canvas id="myCanvas" width="1200" height="300" style="border:none;">


    </canvas>




    <label> How many shapes do you see? </label>


    <input type="number" id="answer"> </input>




    <!-- <button id="colors" onclick="colors()" > Colors </button> -->


    <button id="eraser" onclick="eraser()" > Next </button>


    <button id="compare" onclick="compare();eraser()" > Answer </button>




    <p> <b>    Score: </b> </p> <div id="myScore"> 0 </div>




    <p id="demo"> </p>




</fieldset>








</body>




<script type = "text/javascript">


    var score=0;


    function colors()


    {


        var canvas = document.getElementById("myCanvas");


        var ctx = canvas.getContext("2d");


        x=Math.round(Math.random()*10+1);


        for(f=1; f<=x;f++)


        {



switch(f)


            {


                case 1: c="#ff2a00"; break


                case 2: c="#ffa500"; break


                case 3: c="#ffd700"; break


                case 4: c="#58c142"; break


                case 5: c="#2c51e1"; break


                case 6: c="#0d8e91"; break


                case 7: c="#cc33aa"; break


                case 8: c="#ff8db7"; break


                case 9: c="#ac6ab9"; break


                case 10: c="#1b0f22"; break


            }




            ctx.font = "20px Calibri";




            ctx.fillStyle=c;


            ctx.fillRect(10+f*100,100, 50, 50);


        }


    }




    function eraser()


    {


        var canvas = document.getElementById("myCanvas");


        var ctx = canvas.getContext("2d");


        ctx.clearRect(0,0,1200,300); 


        colors();


    }




    colors()




    function compare()


    {


        ans=document.getElementById("answer").value




        if (ans==x)    {


            score += 1;


            document.getElementById("myScore").innerHTML=score.toString()


            document.getElementById("demo").innerHTML="Hooray! You are correct! "


        }


        else {


            document.getElementById("demo").innerHTML="Sorry, you are wrong..."


        }


    }




</script>



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