varying colors processing

i've operative porting guess formula over unchanging java netbeans. distant well, many all works great, solely i non-grayscale colors.

i have book draws spin pattern, should change colors spin formed modulus check. book seems hang, however, i can't unequivocally explain why.

if anyone trust guess java, tell me where mistake is, i'd unequivocally adore know.

for effect peer-review, here's small program:

package spirals;
import processing.core.*;

public category sure extends papplet
{
    boyant x, y;
    int i = 1, dia = 1;

    boyant angle = 0.0f, circuit = 0f;
    boyant speed = 0.05f;

    //color palette
    int gray = 0x0444444;
    int blue = 0x07cb5f7;
    int pinkish = 0x0f77cb5;
    int youthful = 0x0b5f77c;

    open main(){}

    open stationary vacant main( string[] args )
    {
        papplet.main( new string[] { "spirals.main" } );
    }

    open vacant setup()
    {
        background( gray );
        size( 400, 400 );
        nostroke();
        smooth();
    }

    open vacant draw()
    {
        if( i % 11 == 0 )
            fill( youthful );
        else if( i % 13 == 0 )
            fill( blue );
        else if( i % 17 == 0 )
            fill( pinkish );
        else
            fill( gray );

        circuit += 0.1f; //ever rather boost orbit
        angle += speed % ( extent * tallness );

        boyant sinval = sin( angle );
        boyant cosval = cos( angle );

        //calculate (x, y) furnish an orbit
        x = ( extent / 2 ) + ( cosval * circuit );
        y = ( tallness / 2 ) + ( sinval * circuit );

        dia %= 11; //keep hole within bounds.
        ellipse( x, y, dia, dia );
        dia++;
        i++;
    }
}