export declare class SimpleCanvas {
    protected ctx: CanvasRenderingContext2D;
    constructor(canvasId: string, width: number, height: number);
    clear(): void;
    line(x1: number, y1: number, x2: number, y2: number): void;
    rectangle(x1: number, y1: number, x2: number, y2: number): void;
}