### Learning Math and Coding with Robots

 Grid: Tics Lines: Width px Hash Lines: Width px Labels: Font px Trace Lines: Robot 1: Width px Robot 2: Width px Robot 3: Width px Robot 4: Width px
 Axes: x-axis y-axis Show Grid Grid: 24x24 inches 36x36 inches 72x72 inches 96x96 inches 192x192 inches Quad: 4 quadrants 1 quadrant Hardware Units: US Customary Metric
 Background:

#### Robot 1

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 2

 Initial Position: ( in, in) Initial Angle: deg Current Position: (6 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 3

 Initial Position: ( in, in) Initial Angle: deg Current Position: (12 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 4

 Initial Position: ( in, in) Initial Angle: deg Current Position: (18 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Helicopter Hovering Over a Lake
Problem Statement:
The pre-placed blocks draw a helicopter. Make the propellers on the helicopter spin, and move the helicopter across the sky above the lake.
```/* Code generated by RoboBlockly v2.0 */
#include <chplot.h>
double i;
CPlot plot;

for(i = 1; i <= 36; i++) {
//plot.backgroundImage("emeraldBay.png");
plot.strokeColor("#666666");
plot.fillColor("#666666");
plot.circle(i + 1, 30, 1.5);
plot.strokeColor("#ff6600");
plot.line(i - 0.5, 30, i - 4, 30);
delaySeconds(0.03);
plot.line(i + 1, 31.5, i + 1, 32.5);
delaySeconds(0.03);
plot.strokeColor("#666666");
plot.line(i - 4, 31, i - 4, 29);
delaySeconds(0.03);
plot.line(i - 3, 32.5, i + 4, 32.5);
delaySeconds(0.03);
}

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, 0, 36);
plot.ticsRange(PLOT_AXIS_XY, 6);
plot.sizeRatio(1);
plot.plotting();```
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Problem Statement:
The pre-placed blocks draw a helicopter. Make the propellers on the helicopter spin, and move the helicopter across the sky above the lake.

Time