Create an AI-generated image of a rectangular rug with dimensions 2x3 meters. The rug should feature a mid-century modern pattern characterized by large, simple, and repetitive geometric forms. The design should include circles, squares, and triangles in a balanced and harmonious arrangement. Use earth tones such as browns, beiges, and muted greens for the color palette. The geometric shapes should be bold and clearly defined, with clean lines and a minimalist aesthetic that reflects the timeless elegance of mid-century design. Ensure the pattern is consistent and evenly distributed across the rug's surface, emphasizing simplicity and symmetry.