attribute vec4 position;
attribute vec4 color;

varying lowp vec4 colorVarying;

uniform mat4 modelViewProjectionMatrix;
uniform mat3 normalMatrix;
uniform float time;

void main( void ) {
	gl_Position = modelViewProjectionMatrix * position;

	if(sin(time / 8.0) < 0.0)
		gl_Position.y -= gl_Position.x*gl_Position.x*gl_Position.z*sin(time)*0.02;
	else
		gl_Position.y -= gl_Position.x*gl_Position.z*sin(time)*0.05;

	colorVarying = color;
}