/* Code generated by RoboBlockly v2.0 */
/* Problem Statement: 
    Run the program and find the pattern for the sequence of
    numbers. Use the pattern to find the fourth number in the
    sequence.*/
#include <chplot.h>
double n;
CPlot plot;
int count;
int count2;

// This is a sample solution
printf("Please complete the sequence:  20, 5, -10, ___  . The 4th number is -25.");
printf("The numbers of stars will appear in order of the sequence. If the number is negative, it will be hexagons.");
for(i = 0; i <= 3; i++) {
  //plot.backgroundImage("stars.png");
  n = 20 + -15 * i;
  if (n >= 0) {
    count = 0;
    while(count < n) {
      plot.strokeColor(randcolor());
      plot.star(randdouble(-12, 24), randdouble(-12, 24), 1.5, 0);
      count = count + 1;
    }
  }
  else {
    double repeat_end = abs(n);
    count2 = 0;
    while(count2 < repeat_end) {
      plot.strokeColor(randcolor());
      plot.regularPolygon(randdouble(-12, 24), randdouble(-12, 24), 5, 1, 30);
      count2 = count2 + 1;
    }
  }
  delaySeconds(1);
}
plot.strokeColor("yellow");
plot.text("You are correct! Well done!", PLOT_TEXT_LEFT, -6, 8);

plot.label(PLOT_AXIS_XY, "");
plot.grid(PLOT_OFF);
plot.tics(PLOT_AXIS_XY, PLOT_OFF);
plot.axis(PLOT_AXIS_XY, PLOT_OFF);
plot.axisRange(PLOT_AXIS_XY, -12, 24);
plot.ticsRange(PLOT_AXIS_XY, 6);
plot.sizeRatio(1);
plot.plotting();