vertices[7] = (float)y+height + 0.5f;
vertices[8] = (float)x + 0.5f;
vertices[9] = (float)y + 0.5f;
WebGLBuffer buffer = mGlContext.createBuffer();
mGlContext.bindBuffer(WebGLRenderingContext.ARRAY_BUFFER, buffer);
mGlContext.bufferData(WebGLRenderingContext.ARRAY_BUFFER, Float32Array.create(vertices), WebGLRenderingContext.STREAM_DRAW);
mGlContext.vertexAttribPointer(mCurrentShader.getAPosition(), 2, WebGLRenderingContext.FLOAT, false, 0, 0);
mGlContext.drawArrays(WebGLRenderingContext.LINE_STRIP, 0, 5);