Generate a set of minimalist graffiti-inspired graphic designs suitable for t-shirts. These designs should feature clean lines, bold shapes, and striking compositions, embodying the essence of street art in a minimalist style. Each design should leave space for personalized text insertion, allowing for customization. Ensure that the designs are versatile and scalable for printing on t-shirts while maintaining their urban edge and aesthetic appeal. Aim to create visually impactful designs that resonate with street culture and provide a canvas for individual expression. White background